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javax.swing
public class: JList [javadoc | source]
java.lang.Object
   java.awt.Component
      java.awt.Container
         javax.swing.JComponent
            javax.swing.JList

All Implemented Interfaces:
    Scrollable, Accessible, HasGetTransferHandler, Serializable, MenuContainer, ImageObserver

A component that displays a list of objects and allows the user to select one or more items. A separate model, {@code ListModel}, maintains the contents of the list.

It's easy to display an array or Vector of objects, using the {@code JList} constructor that automatically builds a read-only {@code ListModel} instance for you:

{@code
// Create a JList that displays strings from an array

String[] data = {"one", "two", "three", "four"};
JList myList = new JList(data);

// Create a JList that displays the superclasses of JList.class, by
// creating it with a Vector populated with this data

Vector> superClasses = new Vector>();
Class rootClass = javax.swing.JList.class;
for(Class cls = rootClass; cls != null; cls = cls.getSuperclass()) {
    superClasses.addElement(cls);
}
JList> myList = new JList>(superClasses);

// The automatically created model is stored in JList's "model"
// property, which you can retrieve

ListModel> model = myList.getModel();
for(int i = 0; i < model.getSize(); i++) {
    System.out.println(model.getElementAt(i));
}
}

A {@code ListModel} can be supplied directly to a {@code JList} by way of a constructor or the {@code setModel} method. The contents need not be static - the number of items, and the values of items can change over time. A correct {@code ListModel} implementation notifies the set of {@code javax.swing.event.ListDataListener}s that have been added to it, each time a change occurs. These changes are characterized by a {@code javax.swing.event.ListDataEvent}, which identifies the range of list indices that have been modified, added, or removed. {@code JList}'s {@code ListUI} is responsible for keeping the visual representation up to date with changes, by listening to the model.

Simple, dynamic-content, {@code JList} applications can use the {@code DefaultListModel} class to maintain list elements. This class implements the {@code ListModel} interface and also provides a java.util.Vector-like API. Applications that need a more custom ListModel implementation may instead wish to subclass {@code AbstractListModel}, which provides basic support for managing and notifying listeners. For example, a read-only implementation of {@code AbstractListModel}:

{@code
// This list model has about 2^16 elements.  Enjoy scrolling.

ListModel bigData = new AbstractListModel() {
    public int getSize() { return Short.MAX_VALUE; }
    public String getElementAt(int index) { return "Index " + index; }
};
}

The selection state of a {@code JList} is managed by another separate model, an instance of {@code ListSelectionModel}. {@code JList} is initialized with a selection model on construction, and also contains methods to query or set this selection model. Additionally, {@code JList} provides convenient methods for easily managing the selection. These methods, such as {@code setSelectedIndex} and {@code getSelectedValue}, are cover methods that take care of the details of interacting with the selection model. By default, {@code JList}'s selection model is configured to allow any combination of items to be selected at a time; selection mode {@code MULTIPLE_INTERVAL_SELECTION}. The selection mode can be changed on the selection model directly, or via {@code JList}'s cover method. Responsibility for updating the selection model in response to user gestures lies with the list's {@code ListUI}.

A correct {@code ListSelectionModel} implementation notifies the set of {@code javax.swing.event.ListSelectionListener}s that have been added to it each time a change to the selection occurs. These changes are characterized by a {@code javax.swing.event.ListSelectionEvent}, which identifies the range of the selection change.

The preferred way to listen for changes in list selection is to add {@code ListSelectionListener}s directly to the {@code JList}. {@code JList} then takes care of listening to the the selection model and notifying your listeners of change.

Responsibility for listening to selection changes in order to keep the list's visual representation up to date lies with the list's {@code ListUI}.

Painting of cells in a {@code JList} is handled by a delegate called a cell renderer, installed on the list as the {@code cellRenderer} property. The renderer provides a {@code java.awt.Component} that is used like a "rubber stamp" to paint the cells. Each time a cell needs to be painted, the list's {@code ListUI} asks the cell renderer for the component, moves it into place, and has it paint the contents of the cell by way of its {@code paint} method. A default cell renderer, which uses a {@code JLabel} component to render, is installed by the lists's {@code ListUI}. You can substitute your own renderer using code like this:

{@code
 // Display an icon and a string for each object in the list.

class MyCellRenderer extends JLabel implements ListCellRenderer {
    final static ImageIcon longIcon = new ImageIcon("long.gif");
    final static ImageIcon shortIcon = new ImageIcon("short.gif");

    // This is the only method defined by ListCellRenderer.
    // We just reconfigure the JLabel each time we're called.

    public Component getListCellRendererComponent(
      JList list,           // the list
      Object value,            // value to display
      int index,               // cell index
      boolean isSelected,      // is the cell selected
      boolean cellHasFocus)    // does the cell have focus
    {
        String s = value.toString();
        setText(s);
        setIcon((s.length() > 10) ? longIcon : shortIcon);
        if (isSelected) {
            setBackground(list.getSelectionBackground());
            setForeground(list.getSelectionForeground());
        } else {
            setBackground(list.getBackground());
            setForeground(list.getForeground());
        }
        setEnabled(list.isEnabled());
        setFont(list.getFont());
        setOpaque(true);
        return this;
    }
}

myList.setCellRenderer(new MyCellRenderer());
}

Another job for the cell renderer is in helping to determine sizing information for the list. By default, the list's {@code ListUI} determines the size of cells by asking the cell renderer for its preferred size for each list item. This can be expensive for large lists of items. To avoid these calculations, you can set a {@code fixedCellWidth} and {@code fixedCellHeight} on the list, or have these values calculated automatically based on a single prototype value:

{@code
JList bigDataList = new JList(bigData);

// We don't want the JList implementation to compute the width
// or height of all of the list cells, so we give it a string
// that's as big as we'll need for any cell.  It uses this to
// compute values for the fixedCellWidth and fixedCellHeight
// properties.

bigDataList.setPrototypeCellValue("Index 1234567890");
}

{@code JList} doesn't implement scrolling directly. To create a list that scrolls, make it the viewport view of a {@code JScrollPane}. For example:

JScrollPane scrollPane = new JScrollPane(myList);

// Or in two steps:
JScrollPane scrollPane = new JScrollPane();
scrollPane.getViewport().setView(myList);

{@code JList} doesn't provide any special handling of double or triple (or N) mouse clicks, but it's easy to add a {@code MouseListener} if you wish to take action on these events. Use the {@code locationToIndex} method to determine what cell was clicked. For example:

MouseListener mouseListener = new MouseAdapter() {
    public void mouseClicked(MouseEvent e) {
        if (e.getClickCount() == 2) {
            int index = list.locationToIndex(e.getPoint());
            System.out.println("Double clicked on Item " + index);
         }
    }
};
list.addMouseListener(mouseListener);

Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the java.beans package. Please see java.beans.XMLEncoder .

See How to Use Lists in The Java Tutorial for further documentation. Also see the article Advanced JList Programming in The Swing Connection.

Nested Class Summary:
public static final class  JList.DropLocation  A subclass of TransferHandler.DropLocation representing a drop location for a JList
protected class  JList.AccessibleJList  This class implements accessibility support for the {@code JList} class. It provides an implementation of the Java Accessibility API appropriate to list user-interface elements.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the java.beans package. Please see {@link java.beans.XMLEncoder}. 

Field Summary
public static final  int VERTICAL    Indicates a vertical layout of cells, in a single column; the default layout. 
public static final  int VERTICAL_WRAP    Indicates a "newspaper style" layout with cells flowing vertically then horizontally. 
public static final  int HORIZONTAL_WRAP    Indicates a "newspaper style" layout with cells flowing horizontally then vertically. 
Fields inherited from javax.swing.JComponent:
DEBUG_GRAPHICS_LOADED,  ui,  listenerList,  paintingChild,  WHEN_FOCUSED,  WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,  WHEN_IN_FOCUSED_WINDOW,  UNDEFINED_CONDITION,  TOOL_TIP_TEXT_KEY,  focusController,  accessibleContext
Fields inherited from java.awt.Container:
layoutMgr,  containerListener,  listeningChildren,  listeningBoundsChildren,  descendantsCount,  preserveBackgroundColor,  INCLUDE_SELF,  SEARCH_HEAVYWEIGHTS,  modalComp,  modalAppContext
Fields inherited from java.awt.Component:
peer,  parent,  appContext,  x,  y,  width,  height,  foreground,  background,  font,  peerFont,  cursor,  locale,  bufferStrategy,  ignoreRepaint,  visible,  enabled,  dropTarget,  popups,  focusTraversalKeys,  LOCK,  minSize,  minSizeSet,  prefSize,  prefSizeSet,  maxSize,  maxSizeSet,  componentOrientation,  newEventsOnly,  componentListener,  focusListener,  hierarchyListener,  hierarchyBoundsListener,  keyListener,  mouseListener,  mouseMotionListener,  mouseWheelListener,  inputMethodListener,  windowClosingException,  actionListenerK,  adjustmentListenerK,  componentListenerK,  containerListenerK,  focusListenerK,  itemListenerK,  keyListenerK,  mouseListenerK,  mouseMotionListenerK,  mouseWheelListenerK,  textListenerK,  ownedWindowK,  windowListenerK,  inputMethodListenerK,  hierarchyListenerK,  hierarchyBoundsListenerK,  windowStateListenerK,  windowFocusListenerK,  eventMask,  isInc,  incRate,  TOP_ALIGNMENT,  CENTER_ALIGNMENT,  BOTTOM_ALIGNMENT,  LEFT_ALIGNMENT,  RIGHT_ALIGNMENT,  isPacked,  backgroundEraseDisabled,  eventCache,  accessibleContext
Constructor:
 public JList() 
 public JList(ListModel<E> dataModel) 
 public JList(E[] listData) 
 public JList(Vector<? extends E> listData) 
    Constructs a JList that displays the elements in the specified Vector. This constructor creates a read-only model for the given {@code Vector}, and then delegates to the constructor that takes a {@code ListModel}.

    Attempts to pass a {@code null} value to this method results in undefined behavior and, most likely, exceptions. The created model references the given {@code Vector} directly. Attempts to modify the {@code Vector} after constructing the list results in undefined behavior.

    Parameters:
    listData - the Vector to be loaded into the data model, {@code non-null}
Method from javax.swing.JList Summary:
addListSelectionListener,   addSelectionInterval,   clearSelection,   createSelectionModel,   dropLocationForPoint,   ensureIndexIsVisible,   fireSelectionValueChanged,   getAccessibleContext,   getAnchorSelectionIndex,   getCellBounds,   getCellRenderer,   getDragEnabled,   getDropLocation,   getDropMode,   getFirstVisibleIndex,   getFixedCellHeight,   getFixedCellWidth,   getLastVisibleIndex,   getLayoutOrientation,   getLeadSelectionIndex,   getListSelectionListeners,   getMaxSelectionIndex,   getMinSelectionIndex,   getModel,   getNextMatch,   getPreferredScrollableViewportSize,   getPrototypeCellValue,   getScrollableBlockIncrement,   getScrollableTracksViewportHeight,   getScrollableTracksViewportWidth,   getScrollableUnitIncrement,   getSelectedIndex,   getSelectedIndices,   getSelectedValue,   getSelectedValues,   getSelectedValuesList,   getSelectionBackground,   getSelectionForeground,   getSelectionMode,   getSelectionModel,   getToolTipText,   getUI,   getUIClassID,   getValueIsAdjusting,   getVisibleRowCount,   indexToLocation,   isSelectedIndex,   isSelectionEmpty,   locationToIndex,   paramString,   removeListSelectionListener,   removeSelectionInterval,   setCellRenderer,   setDragEnabled,   setDropLocation,   setDropMode,   setFixedCellHeight,   setFixedCellWidth,   setLayoutOrientation,   setListData,   setListData,   setModel,   setPrototypeCellValue,   setSelectedIndex,   setSelectedIndices,   setSelectedValue,   setSelectionBackground,   setSelectionForeground,   setSelectionInterval,   setSelectionMode,   setSelectionModel,   setUI,   setValueIsAdjusting,   setVisibleRowCount,   updateUI
Methods from javax.swing.JComponent:
_paintImmediately,   addAncestorListener,   addNotify,   addVetoableChangeListener,   alwaysOnTop,   checkIfChildObscuredBySibling,   clientPropertyChanged,   compWriteObjectNotify,   componentInputMapChanged,   computeVisibleRect,   computeVisibleRect,   contains,   createToolTip,   disable,   dndDone,   dropLocationForPoint,   enable,   firePropertyChange,   firePropertyChange,   firePropertyChange,   fireVetoableChange,   getAccessibleContext,   getActionForKeyStroke,   getActionMap,   getActionMap,   getAlignmentX,   getAlignmentY,   getAncestorListeners,   getAutoscrolls,   getBaseline,   getBaselineResizeBehavior,   getBorder,   getBounds,   getClientProperty,   getComponentGraphics,   getComponentPopupMenu,   getConditionForKeyStroke,   getCreatedDoubleBuffer,   getDebugGraphicsOptions,   getDefaultLocale,   getFontMetrics,   getGraphics,   getGraphicsInvoked,   getHeight,   getInheritsPopupMenu,   getInputMap,   getInputMap,   getInputMap,   getInputVerifier,   getInsets,   getInsets,   getListeners,   getLocation,   getManagingFocusBackwardTraversalKeys,   getManagingFocusForwardTraversalKeys,   getMaximumSize,   getMinimumSize,   getNextFocusableComponent,   getPopupLocation,   getPreferredSize,   getRegisteredKeyStrokes,   getRootPane,   getSize,   getToolTipLocation,   getToolTipText,   getToolTipText,   getTopLevelAncestor,   getTransferHandler,   getUIClassID,   getVerifyInputWhenFocusTarget,   getVetoableChangeListeners,   getVisibleRect,   getWidth,   getWriteObjCounter,   getX,   getY,   grabFocus,   isDoubleBuffered,   isLightweightComponent,   isManagingFocus,   isOpaque,   isOptimizedDrawingEnabled,   isPainting,   isPaintingForPrint,   isPaintingOrigin,   isPaintingTile,   isRequestFocusEnabled,   isValidateRoot,   paint,   paintBorder,   paintChildren,   paintComponent,   paintForceDoubleBuffered,   paintImmediately,   paintImmediately,   paintToOffscreen,   paramString,   print,   printAll,   printBorder,   printChildren,   printComponent,   processComponentKeyEvent,   processKeyBinding,   processKeyBindings,   processKeyBindingsForAllComponents,   processKeyEvent,   processMouseEvent,   processMouseMotionEvent,   putClientProperty,   rectangleIsObscured,   registerKeyboardAction,   registerKeyboardAction,   removeAncestorListener,   removeNotify,   removeVetoableChangeListener,   repaint,   repaint,   requestDefaultFocus,   requestFocus,   requestFocus,   requestFocusInWindow,   requestFocusInWindow,   resetKeyboardActions,   reshape,   revalidate,   safelyGetGraphics,   safelyGetGraphics,   scrollRectToVisible,   setActionMap,   setAlignmentX,   setAlignmentY,   setAutoscrolls,   setBackground,   setBorder,   setComponentPopupMenu,   setCreatedDoubleBuffer,   setDebugGraphicsOptions,   setDefaultLocale,   setDoubleBuffered,   setDropLocation,   setEnabled,   setFocusTraversalKeys,   setFont,   setForeground,   setInheritsPopupMenu,   setInputMap,   setInputVerifier,   setMaximumSize,   setMinimumSize,   setNextFocusableComponent,   setOpaque,   setPaintingChild,   setPreferredSize,   setRequestFocusEnabled,   setToolTipText,   setTransferHandler,   setUI,   setUIProperty,   setVerifyInputWhenFocusTarget,   setVisible,   setWriteObjCounter,   shouldDebugGraphics,   superProcessMouseMotionEvent,   unregisterKeyboardAction,   update,   updateUI
Methods from java.awt.Container:
add,   add,   add,   add,   add,   addContainerListener,   addImpl,   addNotify,   addPropertyChangeListener,   addPropertyChangeListener,   adjustDecendantsOnParent,   adjustDescendants,   adjustListeningChildren,   applyComponentOrientation,   areFocusTraversalKeysSet,   canContainFocusOwner,   checkGD,   clearCurrentFocusCycleRootOnHide,   clearMostRecentFocusOwnerOnHide,   containsFocus,   countComponents,   countHierarchyMembers,   createChildHierarchyEvents,   createHierarchyEvents,   decreaseComponentCount,   deliverEvent,   dispatchEventImpl,   dispatchEventToSelf,   doLayout,   eventEnabled,   findComponentAt,   findComponentAt,   findComponentAt,   findComponentAtImpl,   getAccessibleAt,   getAccessibleChild,   getAccessibleChildrenCount,   getAlignmentX,   getAlignmentY,   getComponent,   getComponentAt,   getComponentAt,   getComponentCount,   getComponentZOrder,   getComponents,   getComponentsSync,   getComponents_NoClientCode,   getContainerListeners,   getDropTargetEventTarget,   getFocusTraversalKeys,   getFocusTraversalPolicy,   getHeavyweightContainer,   getInsets,   getLayout,   getListeners,   getMaximumSize,   getMinimumSize,   getMouseEventTarget,   getMousePosition,   getOpaqueShape,   getPreferredSize,   getTraversalRoot,   hasHeavyweightDescendants,   hasLightweightDescendants,   increaseComponentCount,   initializeFocusTraversalKeys,   insets,   invalidate,   invalidateParent,   invalidateTree,   isAncestorOf,   isFocusCycleRoot,   isFocusCycleRoot,   isFocusTraversalPolicyProvider,   isFocusTraversalPolicySet,   isRecursivelyVisibleUpToHeavyweightContainer,   isSameOrAncestorOf,   isValidateRoot,   layout,   lightweightPaint,   lightweightPrint,   list,   list,   locate,   minimumSize,   mixOnHiding,   mixOnReshaping,   mixOnShowing,   mixOnValidating,   mixOnZOrderChanging,   numListening,   paint,   paintComponents,   paintHeavyweightComponents,   paramString,   postProcessKeyEvent,   postsOldMouseEvents,   preProcessKeyEvent,   preferredSize,   print,   printComponents,   printHeavyweightComponents,   processContainerEvent,   processEvent,   proxyEnableEvents,   recursiveApplyCurrentShape,   recursiveApplyCurrentShape,   recursiveApplyCurrentShape,   recursiveSubtractAndApplyShape,   recursiveSubtractAndApplyShape,   recursiveSubtractAndApplyShape,   remove,   remove,   removeAll,   removeContainerListener,   removeNotify,   setComponentZOrder,   setFocusCycleRoot,   setFocusTraversalKeys,   setFocusTraversalPolicy,   setFocusTraversalPolicyProvider,   setFont,   setLayout,   transferFocusDownCycle,   update,   updateGraphicsData,   validate,   validateTree,   validateUnconditionally
Methods from java.awt.Component:
action,   add,   addComponentListener,   addFocusListener,   addHierarchyBoundsListener,   addHierarchyListener,   addInputMethodListener,   addKeyListener,   addMouseListener,   addMouseMotionListener,   addMouseWheelListener,   addNotify,   addPropertyChangeListener,   addPropertyChangeListener,   adjustListeningChildrenOnParent,   applyComponentOrientation,   applyCompoundShape,   applyCurrentShape,   areBoundsValid,   areFocusTraversalKeysSet,   areInputMethodsEnabled,   autoProcessMouseWheel,   bounds,   canBeFocusOwner,   canBeFocusOwnerRecursively,   checkGD,   checkImage,   checkImage,   checkTreeLock,   checkWindowClosingException,   clearCurrentFocusCycleRootOnHide,   clearMostRecentFocusOwnerOnHide,   coalesceEvents,   constructComponentName,   contains,   contains,   containsFocus,   countHierarchyMembers,   createBufferStrategy,   createBufferStrategy,   createHierarchyEvents,   createImage,   createImage,   createVolatileImage,   createVolatileImage,   deliverEvent,   disable,   disableEvents,   dispatchEvent,   dispatchEventImpl,   dispatchMouseWheelToAncestor,   doLayout,   enable,   enable,   enableEvents,   enableInputMethods,   eventEnabled,   eventTypeEnabled,   findUnderMouseInWindow,   firePropertyChange,   firePropertyChange,   firePropertyChange,   firePropertyChange,   firePropertyChange,   firePropertyChange,   firePropertyChange,   firePropertyChange,   firePropertyChange,   getAccessControlContext,   getAccessibleContext,   getAccessibleIndexInParent,   getAccessibleStateSet,   getAlignmentX,   getAlignmentY,   getBackBuffer,   getBackground,   getBaseline,   getBaselineResizeBehavior,   getBounds,   getBounds,   getBoundsOp,   getBufferStrategy,   getColorModel,   getComponentAt,   getComponentAt,   getComponentListeners,   getComponentOrientation,   getContainer,   getContainingWindow,   getCursor,   getCursor_NoClientCode,   getDropTarget,   getFocusCycleRootAncestor,   getFocusListeners,   getFocusTraversalKeys,   getFocusTraversalKeysEnabled,   getFocusTraversalKeys_NoIDCheck,   getFont,   getFontMetrics,   getFont_NoClientCode,   getForeground,   getGraphics,   getGraphicsConfiguration,   getGraphicsConfiguration_NoClientCode,   getGraphics_NoClientCode,   getHWPeerAboveMe,   getHeight,   getHierarchyBoundsListeners,   getHierarchyListeners,   getIgnoreRepaint,   getInputContext,   getInputMethodListeners,   getInputMethodRequests,   getKeyListeners,   getListeners,   getLocale,   getLocation,   getLocation,   getLocationOnScreen,   getLocationOnScreen_NoTreeLock,   getLocationOnWindow,   getMaximumSize,   getMinimumSize,   getMouseListeners,   getMouseMotionListeners,   getMousePosition,   getMouseWheelListeners,   getName,   getNativeContainer,   getNextFocusCandidate,   getNormalShape,   getObjectLock,   getOpaqueShape,   getParent,   getParent_NoClientCode,   getPeer,   getPreferredSize,   getPropertyChangeListeners,   getPropertyChangeListeners,   getSiblingIndexAbove,   getSiblingIndexBelow,   getSize,   getSize,   getToolkit,   getToolkitImpl,   getTraversalRoot,   getTreeLock,   getWidth,   getX,   getY,   gotFocus,   handleEvent,   hasFocus,   hide,   imageUpdate,   initializeFocusTraversalKeys,   inside,   invalidate,   invalidateIfValid,   invalidateParent,   isAutoFocusTransferOnDisposal,   isBackgroundSet,   isCoalescingEnabled,   isCursorSet,   isDisplayable,   isDoubleBuffered,   isEnabled,   isEnabledImpl,   isFocusCycleRoot,   isFocusOwner,   isFocusTraversable,   isFocusTraversableOverridden,   isFocusable,   isFontSet,   isForegroundSet,   isInstanceOf,   isLightweight,   isMaximumSizeSet,   isMinimumSizeSet,   isMixingNeeded,   isNonOpaqueForMixing,   isOpaque,   isPreferredSizeSet,   isRecursivelyVisible,   isSameOrAncestorOf,   isShowing,   isValid,   isVisible,   isVisible_NoClientCode,   keyDown,   keyUp,   layout,   lightweightPaint,   lightweightPrint,   list,   list,   list,   list,   list,   locate,   location,   lostFocus,   minimumSize,   mixOnHiding,   mixOnReshaping,   mixOnShowing,   mixOnValidating,   mixOnZOrderChanging,   mouseDown,   mouseDrag,   mouseEnter,   mouseExit,   mouseMove,   mouseUp,   move,   nextFocus,   numListening,   paint,   paintAll,   paintHeavyweightComponents,   paramString,   pointRelativeToComponent,   postEvent,   postsOldMouseEvents,   preferredSize,   prepareImage,   prepareImage,   print,   printAll,   printHeavyweightComponents,   processComponentEvent,   processEvent,   processFocusEvent,   processHierarchyBoundsEvent,   processHierarchyEvent,   processInputMethodEvent,   processKeyEvent,   processMouseEvent,   processMouseMotionEvent,   processMouseWheelEvent,   relocateComponent,   remove,   removeComponentListener,   removeFocusListener,   removeHierarchyBoundsListener,   removeHierarchyListener,   removeInputMethodListener,   removeKeyListener,   removeMouseListener,   removeMouseMotionListener,   removeMouseWheelListener,   removeNotify,   removePropertyChangeListener,   removePropertyChangeListener,   repaint,   repaint,   repaint,   repaint,   requestFocus,   requestFocus,   requestFocus,   requestFocus,   requestFocusHelper,   requestFocusHelper,   requestFocusInWindow,   requestFocusInWindow,   requestFocusInWindow,   requestFocusInWindow,   reshape,   resize,   resize,   revalidate,   setAutoFocusTransferOnDisposal,   setBackground,   setBounds,   setBounds,   setBoundsOp,   setComponentOrientation,   setCursor,   setDropTarget,   setEnabled,   setFocusTraversalKeys,   setFocusTraversalKeysEnabled,   setFocusTraversalKeys_NoIDCheck,   setFocusable,   setFont,   setForeground,   setGraphicsConfiguration,   setIgnoreRepaint,   setLocale,   setLocation,   setLocation,   setMaximumSize,   setMinimumSize,   setName,   setPreferredSize,   setRequestFocusController,   setSize,   setSize,   setVisible,   show,   show,   size,   subtractAndApplyShape,   subtractAndApplyShapeBelowMe,   toString,   transferFocus,   transferFocus,   transferFocusBackward,   transferFocusBackward,   transferFocusUpCycle,   update,   updateCursorImmediately,   updateGraphicsData,   updateZOrder,   validate
Methods from java.lang.Object:
clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait
Method from javax.swing.JList Detail:
 public  void addListSelectionListener(ListSelectionListener listener) 
    Adds a listener to the list, to be notified each time a change to the selection occurs; the preferred way of listening for selection state changes. {@code JList} takes care of listening for selection state changes in the selection model, and notifies the given listener of each change. {@code ListSelectionEvent}s sent to the listener have a {@code source} property set to this list.
 public  void addSelectionInterval(int anchor,
    int lead) 
    Sets the selection to be the union of the specified interval with current selection. Both the {@code anchor} and {@code lead} indices are included. {@code anchor} doesn't have to be less than or equal to {@code lead}. This is a cover method that delegates to the method of the same name on the list's selection model.

    Refer to the documentation of the selection model class being used for details on how values less than {@code 0} are handled.

 public  void clearSelection() 
    Clears the selection; after calling this method, {@code isSelectionEmpty} will return {@code true}. This is a cover method that delegates to the method of the same name on the list's selection model.
 protected ListSelectionModel createSelectionModel() 
    Returns an instance of {@code DefaultListSelectionModel}; called during construction to initialize the list's selection model property.
 DropLocation dropLocationForPoint(Point p) 
    Calculates a drop location in this component, representing where a drop at the given point should insert data.
 public  void ensureIndexIsVisible(int index) 
    Scrolls the list within an enclosing viewport to make the specified cell completely visible. This calls {@code scrollRectToVisible} with the bounds of the specified cell. For this method to work, the {@code JList} must be within a JViewport.

    If the given index is outside the list's range of cells, this method results in nothing.

 protected  void fireSelectionValueChanged(int firstIndex,
    int lastIndex,
    boolean isAdjusting) 
    Notifies {@code ListSelectionListener}s added directly to the list of selection changes made to the selection model. {@code JList} listens for changes made to the selection in the selection model, and forwards notification to listeners added to the list directly, by calling this method.

    This method constructs a {@code ListSelectionEvent} with this list as the source, and the specified arguments, and sends it to the registered {@code ListSelectionListeners}.

 public AccessibleContext getAccessibleContext() 
    Gets the {@code AccessibleContext} associated with this {@code JList}. For {@code JList}, the {@code AccessibleContext} takes the form of an {@code AccessibleJList}.

    A new {@code AccessibleJList} instance is created if necessary.

 public int getAnchorSelectionIndex() 
    Returns the anchor selection index. This is a cover method that delegates to the method of the same name on the list's selection model.
 public Rectangle getCellBounds(int index0,
    int index1) 
    Returns the bounding rectangle, in the list's coordinate system, for the range of cells specified by the two indices. These indices can be supplied in any order.

    If the smaller index is outside the list's range of cells, this method returns {@code null}. If the smaller index is valid, but the larger index is outside the list's range, the bounds of just the first index is returned. Otherwise, the bounds of the valid range is returned.

    This is a cover method that delegates to the method of the same name in the list's {@code ListUI}. It returns {@code null} if the list has no {@code ListUI}.

 public ListCellRenderer<? super E> getCellRenderer() 
    Returns the object responsible for painting list items.
 public boolean getDragEnabled() 
    Returns whether or not automatic drag handling is enabled.
 public final DropLocation getDropLocation() 
    Returns the location that this component should visually indicate as the drop location during a DnD operation over the component, or {@code null} if no location is to currently be shown.

    This method is not meant for querying the drop location from a {@code TransferHandler}, as the drop location is only set after the {@code TransferHandler}'s canImport has returned and has allowed for the location to be shown.

    When this property changes, a property change event with name "dropLocation" is fired by the component.

    By default, responsibility for listening for changes to this property and indicating the drop location visually lies with the list's {@code ListUI}, which may paint it directly and/or install a cell renderer to do so. Developers wishing to implement custom drop location painting and/or replace the default cell renderer, may need to honor this property.

 public final DropMode getDropMode() 
    Returns the drop mode for this component.
 public int getFirstVisibleIndex() 
    Returns the smallest list index that is currently visible. In a left-to-right {@code componentOrientation}, the first visible cell is found closest to the list's upper-left corner. In right-to-left orientation, it is found closest to the upper-right corner. If nothing is visible or the list is empty, {@code -1} is returned. Note that the returned cell may only be partially visible.
 public int getFixedCellHeight() 
    Returns the value of the {@code fixedCellHeight} property.
 public int getFixedCellWidth() 
    Returns the value of the {@code fixedCellWidth} property.
 public int getLastVisibleIndex() 
    Returns the largest list index that is currently visible. If nothing is visible or the list is empty, {@code -1} is returned. Note that the returned cell may only be partially visible.
 public int getLayoutOrientation() 
    Returns the layout orientation property for the list: {@code VERTICAL} if the layout is a single column of cells, {@code VERTICAL_WRAP} if the layout is "newspaper style" with the content flowing vertically then horizontally, or {@code HORIZONTAL_WRAP} if the layout is "newspaper style" with the content flowing horizontally then vertically.
 public int getLeadSelectionIndex() 
    Returns the lead selection index. This is a cover method that delegates to the method of the same name on the list's selection model.
 public ListSelectionListener[] getListSelectionListeners() 
    Returns an array of all the {@code ListSelectionListener}s added to this {@code JList} by way of {@code addListSelectionListener}.
 public int getMaxSelectionIndex() 
    Returns the largest selected cell index, or {@code -1} if the selection is empty. This is a cover method that delegates to the method of the same name on the list's selection model.
 public int getMinSelectionIndex() 
    Returns the smallest selected cell index, or {@code -1} if the selection is empty. This is a cover method that delegates to the method of the same name on the list's selection model.
 public ListModel<E> getModel() 
    Returns the data model that holds the list of items displayed by the JList component.
 public int getNextMatch(String prefix,
    int startIndex,
    Bias bias) 
    Returns the next list element whose {@code toString} value starts with the given prefix.
 public Dimension getPreferredScrollableViewportSize() 
    Computes the size of viewport needed to display {@code visibleRowCount} rows. The value returned by this method depends on the layout orientation:

    {@code VERTICAL}:
    This is trivial if both {@code fixedCellWidth} and {@code fixedCellHeight} have been set (either explicitly or by specifying a prototype cell value). The width is simply the {@code fixedCellWidth} plus the list's horizontal insets. The height is the {@code fixedCellHeight} multiplied by the {@code visibleRowCount}, plus the list's vertical insets.

    If either {@code fixedCellWidth} or {@code fixedCellHeight} haven't been specified, heuristics are used. If the model is empty, the width is the {@code fixedCellWidth}, if greater than {@code 0}, or a hard-coded value of {@code 256}. The height is the {@code fixedCellHeight} multiplied by {@code visibleRowCount}, if {@code fixedCellHeight} is greater than {@code 0}, otherwise it is a hard-coded value of {@code 16} multiplied by {@code visibleRowCount}.

    If the model isn't empty, the width is the preferred size's width, typically the width of the widest list element. The height is the {@code fixedCellHeight} multiplied by the {@code visibleRowCount}, plus the list's vertical insets.

    {@code VERTICAL_WRAP} or {@code HORIZONTAL_WRAP}:
    This method simply returns the value from {@code getPreferredSize}. The list's {@code ListUI} is expected to override {@code getPreferredSize} to return an appropriate value.

 public E getPrototypeCellValue() 
    Returns the "prototypical" cell value -- a value used to calculate a fixed width and height for cells. This can be {@code null} if there is no such value.
 public int getScrollableBlockIncrement(Rectangle visibleRect,
    int orientation,
    int direction) 
    Returns the distance to scroll to expose the next or previous block.

    For vertical scrolling, the following rules are used:

    • if scrolling down, returns the distance to scroll so that the last visible element becomes the first completely visible element
    • if scrolling up, returns the distance to scroll so that the first visible element becomes the last completely visible element
    • returns {@code visibleRect.height} if the list is empty

    For horizontal scrolling, when the layout orientation is either {@code VERTICAL_WRAP} or {@code HORIZONTAL_WRAP}:

    • if scrolling right, returns the distance to scroll so that the last visible element becomes the first completely visible element
    • if scrolling left, returns the distance to scroll so that the first visible element becomes the last completely visible element
    • returns {@code visibleRect.width} if the list is empty

    For horizontal scrolling and {@code VERTICAL} orientation, returns {@code visibleRect.width}.

    Note that the value of {@code visibleRect} must be the equal to {@code this.getVisibleRect()}.

 public boolean getScrollableTracksViewportHeight() 
    Returns {@code true} if this {@code JList} is displayed in a {@code JViewport} and the viewport is taller than the list's preferred height, or if the layout orientation is {@code VERTICAL_WRAP} and {@code visibleRowCount <= 0}; otherwise returns {@code false}.

    If {@code false}, then don't track the viewport's height. This allows vertical scrolling if the {@code JViewport} is itself embedded in a {@code JScrollPane}.

 public boolean getScrollableTracksViewportWidth() 
    Returns {@code true} if this {@code JList} is displayed in a {@code JViewport} and the viewport is wider than the list's preferred width, or if the layout orientation is {@code HORIZONTAL_WRAP} and {@code visibleRowCount <= 0}; otherwise returns {@code false}.

    If {@code false}, then don't track the viewport's width. This allows horizontal scrolling if the {@code JViewport} is itself embedded in a {@code JScrollPane}.

 public int getScrollableUnitIncrement(Rectangle visibleRect,
    int orientation,
    int direction) 
    Returns the distance to scroll to expose the next or previous row (for vertical scrolling) or column (for horizontal scrolling).

    For horizontal scrolling, if the layout orientation is {@code VERTICAL}, then the list's font size is returned (or {@code 1} if the font is {@code null}).

 public int getSelectedIndex() 
    Returns the smallest selected cell index; the selection when only a single item is selected in the list. When multiple items are selected, it is simply the smallest selected index. Returns {@code -1} if there is no selection.

    This method is a cover that delegates to {@code getMinSelectionIndex}.

 public int[] getSelectedIndices() 
    Returns an array of all of the selected indices, in increasing order.
 public E getSelectedValue() 
    Returns the value for the smallest selected cell index; the selected value when only a single item is selected in the list. When multiple items are selected, it is simply the value for the smallest selected index. Returns {@code null} if there is no selection.

    This is a convenience method that simply returns the model value for {@code getMinSelectionIndex}.

 public Object[] getSelectedValues() 
Deprecated! As - of JDK 1.7, replaced by #getSelectedValuesList()

    Returns an array of all the selected values, in increasing order based on their indices in the list.
 public List<E> getSelectedValuesList() 
    Returns a list of all the selected items, in increasing order based on their indices in the list.
 public Color getSelectionBackground() 
    Returns the color used to draw the background of selected items. {@code DefaultListCellRenderer} uses this color to draw the background of items in the selected state, as do the renderers installed by most {@code ListUI} implementations.
 public Color getSelectionForeground() 
    Returns the color used to draw the foreground of selected items. {@code DefaultListCellRenderer} uses this color to draw the foreground of items in the selected state, as do the renderers installed by most {@code ListUI} implementations.
 public int getSelectionMode() 
    Returns the current selection mode for the list. This is a cover method that delegates to the method of the same name on the list's selection model.
 public ListSelectionModel getSelectionModel() 
    Returns the current selection model. The selection model maintains the selection state of the list. See the class level documentation for more details.
 public String getToolTipText(MouseEvent event) 
    Returns the tooltip text to be used for the given event. This overrides {@code JComponent}'s {@code getToolTipText} to first check the cell renderer component for the cell over which the event occurred, returning its tooltip text, if any. This implementation allows you to specify tooltip text on the cell level, by using {@code setToolTipText} on your cell renderer component.

    Note: For JList to properly display the tooltips of its renderers in this manner, JList must be a registered component with the ToolTipManager. This registration is done automatically in the constructor. However, if at a later point JList is unregistered, by way of a call to {@code setToolTipText(null)}, tips from the renderers will no longer display.

 public ListUI getUI() 
    Returns the {@code ListUI}, the look and feel object that renders this component.
 public String getUIClassID() 
    Returns {@code "ListUI"}, the UIDefaults key used to look up the name of the {@code javax.swing.plaf.ListUI} class that defines the look and feel for this component.
 public boolean getValueIsAdjusting() 
    Returns the value of the selection model's {@code isAdjusting} property.

    This is a cover method that delegates to the method of the same name on the list's selection model.

 public int getVisibleRowCount() 
    Returns the value of the {@code visibleRowCount} property. See the documentation for #setVisibleRowCount for details on how to interpret this value.
 public Point indexToLocation(int index) 
    Returns the origin of the specified item in the list's coordinate system. This method returns {@code null} if the index isn't valid.

    This is a cover method that delegates to the method of the same name in the list's {@code ListUI}. It returns {@code null} if the list has no {@code ListUI}.

 public boolean isSelectedIndex(int index) 
    Returns {@code true} if the specified index is selected, else {@code false}. This is a cover method that delegates to the method of the same name on the list's selection model.
 public boolean isSelectionEmpty() 
    Returns {@code true} if nothing is selected, else {@code false}. This is a cover method that delegates to the method of the same name on the list's selection model.
 public int locationToIndex(Point location) 
    Returns the cell index closest to the given location in the list's coordinate system. To determine if the cell actually contains the specified location, compare the point against the cell's bounds, as provided by {@code getCellBounds}. This method returns {@code -1} if the model is empty

    This is a cover method that delegates to the method of the same name in the list's {@code ListUI}. It returns {@code -1} if the list has no {@code ListUI}.

 protected String paramString() 
    Returns a {@code String} representation of this {@code JList}. This method is intended to be used only for debugging purposes, and the content and format of the returned {@code String} may vary between implementations. The returned {@code String} may be empty, but may not be {@code null}.
 public  void removeListSelectionListener(ListSelectionListener listener) 
    Removes a selection listener from the list.
 public  void removeSelectionInterval(int index0,
    int index1) 
    Sets the selection to be the set difference of the specified interval and the current selection. Both the {@code index0} and {@code index1} indices are removed. {@code index0} doesn't have to be less than or equal to {@code index1}. This is a cover method that delegates to the method of the same name on the list's selection model.

    Refer to the documentation of the selection model class being used for details on how values less than {@code 0} are handled.

 public  void setCellRenderer(ListCellRenderer<? super E> cellRenderer) 
    Sets the delegate that is used to paint each cell in the list. The job of a cell renderer is discussed in detail in the class level documentation.

    If the {@code prototypeCellValue} property is {@code non-null}, setting the cell renderer also causes the {@code fixedCellWidth} and {@code fixedCellHeight} properties to be re-calculated. Only one PropertyChangeEvent is generated however - for the cellRenderer property.

    The default value of this property is provided by the {@code ListUI} delegate, i.e. by the look and feel implementation.

    This is a JavaBeans bound property.

 public  void setDragEnabled(boolean b) 
    Turns on or off automatic drag handling. In order to enable automatic drag handling, this property should be set to {@code true}, and the list's {@code TransferHandler} needs to be {@code non-null}. The default value of the {@code dragEnabled} property is {@code false}.

    The job of honoring this property, and recognizing a user drag gesture, lies with the look and feel implementation, and in particular, the list's {@code ListUI}. When automatic drag handling is enabled, most look and feels (including those that subclass {@code BasicLookAndFeel}) begin a drag and drop operation whenever the user presses the mouse button over an item and then moves the mouse a few pixels. Setting this property to {@code true} can therefore have a subtle effect on how selections behave.

    If a look and feel is used that ignores this property, you can still begin a drag and drop operation by calling {@code exportAsDrag} on the list's {@code TransferHandler}.

 Object setDropLocation(DropLocation location,
    Object state,
    boolean forDrop) 
    Called to set or clear the drop location during a DnD operation. In some cases, the component may need to use it's internal selection temporarily to indicate the drop location. To help facilitate this, this method returns and accepts as a parameter a state object. This state object can be used to store, and later restore, the selection state. Whatever this method returns will be passed back to it in future calls, as the state parameter. If it wants the DnD system to continue storing the same state, it must pass it back every time. Here's how this is used:

    Let's say that on the first call to this method the component decides to save some state (because it is about to use the selection to show a drop index). It can return a state object to the caller encapsulating any saved selection state. On a second call, let's say the drop location is being changed to something else. The component doesn't need to restore anything yet, so it simply passes back the same state object to have the DnD system continue storing it. Finally, let's say this method is messaged with null. This means DnD is finished with this component for now, meaning it should restore state. At this point, it can use the state parameter to restore said state, and of course return null since there's no longer anything to store.

 public final  void setDropMode(DropMode dropMode) 
    Sets the drop mode for this component. For backward compatibility, the default for this property is DropMode.USE_SELECTION. Usage of one of the other modes is recommended, however, for an improved user experience. DropMode.ON, for instance, offers similar behavior of showing items as selected, but does so without affecting the actual selection in the list.

    JList supports the following drop modes:

    • DropMode.USE_SELECTION
    • DropMode.ON
    • DropMode.INSERT
    • DropMode.ON_OR_INSERT
    The drop mode is only meaningful if this component has a TransferHandler that accepts drops.
 public  void setFixedCellHeight(int height) 
    Sets a fixed value to be used for the height of every cell in the list. If {@code height} is -1, cell heights are computed in the {@code ListUI} by applying getPreferredSize to the cell renderer component for each list element.

    The default value of this property is {@code -1}.

    This is a JavaBeans bound property.

 public  void setFixedCellWidth(int width) 
    Sets a fixed value to be used for the width of every cell in the list. If {@code width} is -1, cell widths are computed in the {@code ListUI} by applying getPreferredSize to the cell renderer component for each list element.

    The default value of this property is {@code -1}.

    This is a JavaBeans bound property.

 public  void setLayoutOrientation(int layoutOrientation) 
    Defines the way list cells are layed out. Consider a {@code JList} with five cells. Cells can be layed out in one of the following ways:

    VERTICAL:          0
                       1
                       2
                       3
                       4
    
    HORIZONTAL_WRAP:   0  1  2
                       3  4
    
    VERTICAL_WRAP:     0  3
                       1  4
                       2
    

    A description of these layouts follows:

    Value

    Description

    VERTICAL Cells are layed out vertically in a single column.
    HORIZONTAL_WRAP Cells are layed out horizontally, wrapping to a new row as necessary. If the {@code visibleRowCount} property is less than or equal to zero, wrapping is determined by the width of the list; otherwise wrapping is done in such a way as to ensure {@code visibleRowCount} rows in the list.
    VERTICAL_WRAP Cells are layed out vertically, wrapping to a new column as necessary. If the {@code visibleRowCount} property is less than or equal to zero, wrapping is determined by the height of the list; otherwise wrapping is done at {@code visibleRowCount} rows.

    The default value of this property is VERTICAL.

 public  void setListData(E[] listData) 
    Constructs a read-only ListModel from an array of items, and calls {@code setModel} with this model.

    Attempts to pass a {@code null} value to this method results in undefined behavior and, most likely, exceptions. The created model references the given array directly. Attempts to modify the array after invoking this method results in undefined behavior.

 public  void setListData(Vector<? extends E> listData) 
    Constructs a read-only ListModel from a Vector and calls {@code setModel} with this model.

    Attempts to pass a {@code null} value to this method results in undefined behavior and, most likely, exceptions. The created model references the given {@code Vector} directly. Attempts to modify the {@code Vector} after invoking this method results in undefined behavior.

 public  void setModel(ListModel<E> model) 
    Sets the model that represents the contents or "value" of the list, notifies property change listeners, and then clears the list's selection.

    This is a JavaBeans bound property.

 public  void setPrototypeCellValue(E prototypeCellValue) 
    Sets the {@code prototypeCellValue} property, and then (if the new value is {@code non-null}), computes the {@code fixedCellWidth} and {@code fixedCellHeight} properties by requesting the cell renderer component for the given value (and index 0) from the cell renderer, and using that component's preferred size.

    This method is useful when the list is too long to allow the {@code ListUI} to compute the width/height of each cell, and there is a single cell value that is known to occupy as much space as any of the others, a so-called prototype.

    While all three of the {@code prototypeCellValue}, {@code fixedCellHeight}, and {@code fixedCellWidth} properties may be modified by this method, {@code PropertyChangeEvent} notifications are only sent when the {@code prototypeCellValue} property changes.

    To see an example which sets this property, see the class description above.

    The default value of this property is null.

    This is a JavaBeans bound property.

 public  void setSelectedIndex(int index) 
    Selects a single cell. Does nothing if the given index is greater than or equal to the model size. This is a convenience method that uses {@code setSelectionInterval} on the selection model. Refer to the documentation for the selection model class being used for details on how values less than {@code 0} are handled.
 public  void setSelectedIndices(int[] indices) 
    Changes the selection to be the set of indices specified by the given array. Indices greater than or equal to the model size are ignored. This is a convenience method that clears the selection and then uses {@code addSelectionInterval} on the selection model to add the indices. Refer to the documentation of the selection model class being used for details on how values less than {@code 0} are handled.
 public  void setSelectedValue(Object anObject,
    boolean shouldScroll) 
    Selects the specified object from the list.
 public  void setSelectionBackground(Color selectionBackground) 
    Sets the color used to draw the background of selected items, which cell renderers can use fill selected cells. {@code DefaultListCellRenderer} uses this color to fill the background of items in the selected state, as do the renderers installed by most {@code ListUI} implementations.

    The default value of this property is defined by the look and feel implementation.

    This is a JavaBeans bound property.

 public  void setSelectionForeground(Color selectionForeground) 
    Sets the color used to draw the foreground of selected items, which cell renderers can use to render text and graphics. {@code DefaultListCellRenderer} uses this color to draw the foreground of items in the selected state, as do the renderers installed by most {@code ListUI} implementations.

    The default value of this property is defined by the look and feel implementation.

    This is a JavaBeans bound property.

 public  void setSelectionInterval(int anchor,
    int lead) 
    Selects the specified interval. Both {@code anchor} and {@code lead} indices are included. {@code anchor} doesn't have to be less than or equal to {@code lead}. This is a cover method that delegates to the method of the same name on the list's selection model.

    Refer to the documentation of the selection model class being used for details on how values less than {@code 0} are handled.

 public  void setSelectionMode(int selectionMode) 
    Sets the selection mode for the list. This is a cover method that sets the selection mode directly on the selection model.

    The following list describes the accepted selection modes:

    • {@code ListSelectionModel.SINGLE_SELECTION} - Only one list index can be selected at a time. In this mode, {@code setSelectionInterval} and {@code addSelectionInterval} are equivalent, both replacing the current selection with the index represented by the second argument (the "lead").
    • {@code ListSelectionModel.SINGLE_INTERVAL_SELECTION} - Only one contiguous interval can be selected at a time. In this mode, {@code addSelectionInterval} behaves like {@code setSelectionInterval} (replacing the current selection}, unless the given interval is immediately adjacent to or overlaps the existing selection, and can be used to grow the selection.
    • {@code ListSelectionModel.MULTIPLE_INTERVAL_SELECTION} - In this mode, there's no restriction on what can be selected. This mode is the default.
 public  void setSelectionModel(ListSelectionModel selectionModel) 
    Sets the selectionModel for the list to a non-null ListSelectionModel implementation. The selection model handles the task of making single selections, selections of contiguous ranges, and non-contiguous selections.

    This is a JavaBeans bound property.

 public  void setUI(ListUI ui) 
    Sets the {@code ListUI}, the look and feel object that renders this component.
 public  void setValueIsAdjusting(boolean b) 
    Sets the selection model's {@code valueIsAdjusting} property. When {@code true}, upcoming changes to selection should be considered part of a single change. This property is used internally and developers typically need not call this method. For example, when the model is being updated in response to a user drag, the value of the property is set to {@code true} when the drag is initiated and set to {@code false} when the drag is finished. This allows listeners to update only when a change has been finalized, rather than handling all of the intermediate values.

    You may want to use this directly if making a series of changes that should be considered part of a single change.

    This is a cover method that delegates to the method of the same name on the list's selection model. See the documentation for javax.swing.ListSelectionModel#setValueIsAdjusting for more details.

 public  void setVisibleRowCount(int visibleRowCount) 
    Sets the {@code visibleRowCount} property, which has different meanings depending on the layout orientation: For a {@code VERTICAL} layout orientation, this sets the preferred number of rows to display without requiring scrolling; for other orientations, it affects the wrapping of cells.

    In {@code VERTICAL} orientation:
    Setting this property affects the return value of the #getPreferredScrollableViewportSize method, which is used to calculate the preferred size of an enclosing viewport. See that method's documentation for more details.

    In {@code HORIZONTAL_WRAP} and {@code VERTICAL_WRAP} orientations:
    This affects how cells are wrapped. See the documentation of #setLayoutOrientation for more details.

    The default value of this property is {@code 8}.

    Calling this method with a negative value results in the property being set to {@code 0}.

    This is a JavaBeans bound property.

 public  void updateUI() 
    Resets the {@code ListUI} property by setting it to the value provided by the current look and feel. If the current cell renderer was installed by the developer (rather than the look and feel itself), this also causes the cell renderer and its children to be updated, by calling {@code SwingUtilities.updateComponentTreeUI} on it.