Uses of Package java.lang

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Uses of Package
java.lang

Classes in java.lang used by java.lang
Appendable An `Appendable` object is one to which a sequence of Unicode characters can be added.
Boolean Instances of class `Boolean` represent primitive `boolean` values.
Byte Instances of class `Byte` represent primitive `byte` values.
Character Wrapper class for the primitive char data type.
Character.Subset A subset of Unicode blocks.
Character.UnassignedCharacters A class to encompass all the properties of code points that are currently undefined in the Unicode standard.
Character.UnicodeBlock A family of character subsets in the Unicode specification.
CharSequence General functions on a sequence of chars.
Class A Class represents a Java type.
ClassFormatError A `ClassFormatError` is thrown when a Java Virtual Machine unable to read a class file because the file is corrupted or cannot be interpreted as a class file.
ClassLoader The ClassLoader is a way of customizing the way Java gets its classes and loads them into memory.
ClassNotFoundException Thrown when a class is requested by reflection, but the class definition cannot be found.
Cloneable This interface should be implemented by classes wishing to support of override `Object.clone()`.
CloneNotSupportedException Thrown to indicate an object should not or could not be cloned.
Comparable Interface for objects that can be ordering among other objects.
Double Instances of class `Double` represent primitive `double` values.
Enum This class represents a Java enumeration.
Error Applications should not try to catch errors since they indicate abnormal conditions.
Exception The root class of all exceptions worth catching in a program.
Float Instances of class `Float` represent primitive `float` values.
IllegalAccessException Thrown whenever a reflective method tries to do something that the compiler would not allow.
IllegalArgumentException Thrown when a method is passed an illegal or inappropriate argument.
IllegalMonitorStateException Thrown when a thread attempts to wait or notify on a monitor that it does not own (ie.
IncompatibleClassChangeError An `IncompatibleClassChangeError` is thrown when the definition of a class used by the currently executing method has changed in an incompatible way.
IndexOutOfBoundsException This exception can be thrown to indicate an attempt to access an index which is out of bounds on objects like String, Array, or Vector.
InstantiationException Thrown when an attempt is made to use reflection to build a non-instantiable class (an interface or abstract class).
Integer Instances of class `Integer` represent primitive `int` values.
InterruptedException Thrown when a thread interrupts another thread which was previously sleeping, waiting, or paused in some other way.
LinkageError Subclasses of `LinkageError` are thrown to indicate that two classes which were compatible at separate compilation times cannot be linked to one another.
Long Instances of class `Long` represent primitive `long` values.
NoSuchFieldException Thrown to indicate the class does not have the specified field.
NoSuchMethodException Thrown to indicate the class does not have the specified method.
Number Number is a generic superclass of all the numeric classes, including the wrapper classes Byte, Short, Integer, Long, Float, and Double.
Object Object is the ultimate superclass of every class (excepting interfaces).
Package Everything you ever wanted to know about a package.
Process An instance of a subclass of `Process` is created by the `Runtime.exec` methods.
Runnable Runnable is an interface you implement to indicate that your class can be executed as the main part of a Thread, among other places.
Runtime Runtime represents the Virtual Machine.
RuntimeException All exceptions which are subclasses of `RuntimeException` can be thrown at any time during the execution of a Java virtual machine.
SecurityException The security manager will throw this exception to indicate a security violation.
SecurityManager SecurityManager is a class you can extend to create your own Java security policy.
Short Instances of class `Short` represent primitive `short` values.
StackTraceElement One function call or stack trace element.
String Strings represent an immutable set of characters.
StringBuffer `StringBuffer` represents a changeable `String`.
StringBuilder `StringBuilder` represents a changeable `String`.
Thread Thread represents a single thread of execution in the VM.
Thread.UncaughtExceptionHandler This interface is used to handle uncaught exceptions which cause a `Thread` to terminate.
ThreadGroup ThreadGroup allows you to group Threads together.
ThreadLocal ThreadLocal objects have a different state associated with every Thread that accesses them.
Throwable Throwable is the superclass of all exceptions that can be raised.
VirtualMachineError A `VirtualMachineError` or its subclasses are thrown to indicate there is something wrong with the Java Virtual Machine or that it does not have the resources needed for it to continue execution.
VMProcess Represents one external process.
VMThread VM interface for Thread of executable code.
VMThrowable VM dependant state and support methods for Throwable.

Classes in java.lang used by java.security

Object
Object is the ultimate superclass of every class (excepting interfaces).