Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| IM Profile
PREV PACKAGE NEXT PACKAGE | FRAMES NO FRAMES

## Package java.lang

Provides classes that are fundamental to the Java programming language.

See:
Description

Interface Summary
Runnable | The `Runnable` interface should be implemented by any class whose instances are intended to be executed by a thread.

Class Summary
Boolean | The Boolean class wraps a value of the primitive type `boolean` in an object.
Byte | The Byte class is the standard wrapper for byte values.
Character | The Character class wraps a value of the primitive type `char` in an object.
Class | Instances of the class `Class` represent classes and interfaces in a running Java application.
Double | The Double class wraps a value of the primitive type `double` in an object.
Float | The Float class wraps a value of primitive type `float` in an object.
Integer | The Integer class wraps a value of the primitive type `int` in an object.
Long | The Long class wraps a value of the primitive type `long` in an object.
Math | The class `Math` contains methods for performing basic numeric operations.
Object | Class `Object` is the root of the class hierarchy.
Runtime | Every Java application has a single instance of class `Runtime` that allows the application to interface with the environment in which the application is running.
Short | The Short class is the standard wrapper for short values.
String | The `String` class represents character strings.
StringBuffer | A string buffer implements a mutable sequence of characters.
System | The `System` class contains several useful class fields and methods.
Thread | A thread is a thread of execution in a program.
Throwable | The `Throwable` class is the superclass of all errors and exceptions in the Java language.

Exception Summary
ArithmeticException | Thrown when an exceptional arithmetic condition has occurred.
ArrayIndexOutOfBoundsException | Thrown to indicate that an array has been accessed with an illegal index.
ArrayStoreException | Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects.
ClassCastException | Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance.
ClassNotFoundException | Thrown when an application tries to load in a class through its string name using the `forName` method in class `Class` but no definition for the class with the specified name could be found.
Exception | The class `Exception` and its subclasses are a form of `Throwable` that indicates conditions that a reasonable application might want to catch.
IllegalAccessException | Thrown when an application tries to load in a class, but the currently executing method does not have access to the definition of the specified class, because the class is not public and in another package.
IllegalArgumentException | Thrown to indicate that a method has been passed an illegal or inappropriate argument.
IllegalMonitorStateException | Thrown to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's monitor without owning the specified monitor.
IllegalStateException | Signals that a method has been invoked at an illegal or inappropriate time.
IllegalThreadStateException | Thrown to indicate that a thread is not in an appropriate state for the requested operation.
IndexOutOfBoundsException | Thrown to indicate that an index of some sort (such as to an array, to a string, or to a vector) is out of range.
InstantiationException | Thrown when an application tries to create an instance of a class using the `newInstance` method in class `Class`, but the specified class object cannot be instantiated because it is an interface or is an abstract class.
InterruptedException | Thrown when a thread is waiting, sleeping, or otherwise paused for a long time and another thread interrupts it.
NegativeArraySizeException | Thrown if an application tries to create an array with negative size.
NullPointerException | Thrown when an application attempts to use `null` in a case where an object is required.
NumberFormatException | Thrown to indicate that the application has attempted to convert a string to one of the numeric types, but that the string does not have the appropriate format.
RuntimeException | `RuntimeException` is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.
SecurityException | Thrown by the system to indicate a security violation.
StringIndexOutOfBoundsException | Thrown by the `charAt` method in class `String` and by other `String` methods to indicate that an index is either negative or greater than or equal to the size of the string.

Error Summary
Error | An `Error` is a subclass of `Throwable` that indicates serious problems that a reasonable application should not try to catch.
NoClassDefFoundError | Thrown if the Java Virtual Machine tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the `new` expression) and no definition of the class could be found.
OutOfMemoryError | Thrown when the Java Virtual Machine cannot allocate an object because it is out of memory, and no more memory could be made available by the garbage collector.
VirtualMachineError | Thrown to indicate that the Java Virtual Machine is broken or has run out of resources necessary for it to continue operating.

## Package java.lang Description

Provides classes that are fundamental to the Java programming language.

Since:
  CLDC 1.0

Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| IM Profile
PREV PACKAGE NEXT PACKAGE | FRAMES NO FRAMES

Submit a comment or suggestion Version 2.0 of IM Profile Specification
Java is a trademark or registered trademark of Sun Microsystems, Inc. in the US and other countries. Copyright (c) 1993-2002 Sun Microsystems, Inc. 901 San Antonio Road,Palo Alto, California, 94303, U.S.A. All Rights Reserved.