Uses of Package
java.lang

Packages that use java.lang

Package	Description
java.io
java.lang
java.lang.annotation
java.lang.invoke
java.lang.ref
java.lang.reflect
java.net
java.nio.charset
java.text
java.util
java.util.concurrent

Classes in java.lang used by java.io

Class and Description
Appendable Declares methods to append characters or character sequences.
AutoCloseable
CharSequence This interface represents an ordered set of characters and defines the methods to probe them.
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
Object Class Object is the root of the class hierarchy.
Override An annotation to indicate that a method is intended to override a superclass method.
String The String class represents character strings.
StringBuffer A string buffer implements a mutable sequence of characters.
Throwable The Throwable class is the superclass of all errors and exceptions in the Java language.

Classes in java.lang used by java.lang

Class and Description
Appendable Declares methods to append characters or character sequences.
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.
CharSequence This interface represents an ordered set of characters and defines the methods to probe them.
Class Instances of the class Class represent classes and interfaces in a running Java application.
ClassLoader
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.
Comparable This interface should be implemented by all classes that wish to define a natural order of their instances.
Double The Double class wraps a value of the primitive type double in an object.
Enum Implementation class required to compile enums
Error An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch.
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
Float The Float class wraps a value of primitive type float in an object.
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.
IncompatibleClassChangeError IncompatibleClassChangeError is the superclass of all classes which represent errors that occur when inconsistent class files are loaded into the same running image.
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.
Integer The Integer class wraps a value of the primitive type int in an object.
InterruptedException Thrown when a thread is waiting, sleeping, or otherwise paused for a long time and another thread interrupts it.
LinkageError LinkageError is the superclass of all error classes that occur when loading and linking class files.
Long The Long class wraps a value of the primitive type long in an object.
Number
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.
Object Class Object is the root of the class hierarchy.
Override An annotation to indicate that a method is intended to override a superclass method.
Runnable The Runnable interface should be implemented by any class whose instances are intended to be executed by a thread.
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.
RuntimeException RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.
Short The Short class is the standard wrapper for short values.
StackTraceElement
String The String class represents character strings.
StringBuffer A string buffer implements a mutable sequence of characters.
StringBuilder A string builder implements a mutable sequence of characters.
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.
VirtualMachineError Thrown to indicate that the Java Virtual Machine is broken or has run out of resources necessary for it to continue operating.

Classes in java.lang used by java.lang.annotation

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
Comparable This interface should be implemented by all classes that wish to define a natural order of their instances.
Error An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch.
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
Object Class Object is the root of the class hierarchy.
RuntimeException RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.
String The String class represents character strings.
Throwable The Throwable class is the superclass of all errors and exceptions in the Java language.

Classes in java.lang used by java.lang.invoke

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
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.
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.
Throwable The Throwable class is the superclass of all errors and exceptions in the Java language.

Classes in java.lang used by java.lang.ref

Class and Description
Object Class Object is the root of the class hierarchy.

Classes in java.lang used by java.lang.reflect

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.

Classes in java.lang used by java.net

Class and Description
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
Object Class Object is the root of the class hierarchy.
Override An annotation to indicate that a method is intended to override a superclass method.
String The String class represents character strings.
Throwable The Throwable class is the superclass of all errors and exceptions in the Java language.

Classes in java.lang used by java.nio.charset

Class and Description
Comparable This interface should be implemented by all classes that wish to define a natural order of their instances.
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.

Classes in java.lang used by java.text

Class and Description
Cloneable Deprecated. clone isn't supported in Codename One, this interface is here strictly for compilation purposes
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument.
Object Class Object is the root of the class hierarchy.
Override An annotation to indicate that a method is intended to override a superclass method.
String The String class represents character strings.
Throwable The Throwable class is the superclass of all errors and exceptions in the Java language.

Classes in java.lang used by java.util

Class and Description
Boolean The Boolean class wraps a value of the primitive type boolean in an object.
Class Instances of the class Class represent classes and interfaces in a running Java application.
Comparable This interface should be implemented by all classes that wish to define a natural order of their instances.
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
Iterable Objects of classes that implement this interface can be used within a foreach statement.
Object Class Object is the root of the class hierarchy.
Override An annotation to indicate that a method is intended to override a superclass method.
Runnable The Runnable interface should be implemented by any class whose instances are intended to be executed by a thread.
RuntimeException RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.
String The String class represents character strings.
SuppressWarnings An annotation that indicates a compiler should suppress any warnings of the type specified in the SuppressWarnings.value().
Throwable The Throwable class is the superclass of all errors and exceptions in the Java language.

Classes in java.lang used by java.util.concurrent

Class and Description
Object Class Object is the root of the class hierarchy.
Override An annotation to indicate that a method is intended to override a superclass method.