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## Package java.lang

MID Profile Language Classes included from Java 2 Standard Edition.

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.
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`.
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 using the `interrupt` method in class `Thread`.
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 security manager 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.
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

MID Profile Language Classes included from Java 2 Standard Edition. In addition to the `java.lang` classes specified in the Connected Limited Device Configuration the Mobile Information Device Profile includes the following class from Java 2 Standard Edition.

- java.lang.IllegalStateException.java

`IllegalStateException`s are thrown when illegal transistions are requested, such as scheduling a `TimerTask` or in the containment of user interface components.

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