public CenterLayout() 
{

}

Creates a new layout manager.

 public  void addLayoutComponent(Component comp) 
{
        // not used.
}

Not used.

 public  void addLayoutComponent(String name,
    Component comp) 
{
        // not used
}

Not used.

 public  void layoutContainer(Container parent) 
{
        synchronized (parent.getTreeLock()) {
            if (parent.getComponentCount()  > 0) {
                final Insets insets = parent.getInsets();
                final Dimension parentSize = parent.getSize();
                final Component component = parent.getComponent(0);
                final Dimension componentSize = component.getPreferredSize();
                final int xx = insets.left + (
                    Math.max((parentSize.width - insets.left - insets.right
                                      - componentSize.width) / 2, 0)
                );
                final int yy = insets.top + (
                    Math.max((parentSize.height - insets.top - insets.bottom
                                      - componentSize.height) / 2, 0));
                component.setBounds(xx, yy, componentSize.width, 
                        componentSize.height);
            }
        }
}

Lays out the components.

 public Dimension minimumLayoutSize(Container parent) 
{
        synchronized (parent.getTreeLock()) {
            final Insets insets = parent.getInsets();
            if (parent.getComponentCount()  > 0) {
                final Component component = parent.getComponent(0);
                final Dimension d = component.getMinimumSize();
                return new Dimension(d.width + insets.left + insets.right,
                                 d.height + insets.top + insets.bottom);
            }
            else {
              return new Dimension(insets.left + insets.right,
                                   insets.top + insets.bottom);
            }
        }
}

Returns the minimum size.

 public Dimension preferredLayoutSize(Container parent) 
{
        synchronized (parent.getTreeLock()) {
            final Insets insets = parent.getInsets();
            if (parent.getComponentCount()  > 0) {
                final Component component = parent.getComponent(0);
                final Dimension d = component.getPreferredSize();
                return new Dimension(
                    (int) d.getWidth() + insets.left + insets.right,
                    (int) d.getHeight() + insets.top + insets.bottom
                );
            }
            else {
                return new Dimension(
                    insets.left + insets.right, insets.top + insets.bottom
                );
            }
        }
}

Returns the preferred size.

 public  void removeLayoutComponent(Component comp) 
{
        // not used
}

Not used.

 public  void removeLayoutComponent(String name,
    Component comp) 
{
        // not used
}

Not used.