Uses of Package
java.lang

Packages that use java.lang

Package	Description
java.beans
java.io
java.lang
java.lang.annotation
java.lang.invoke
java.lang.ref	Provides reference-object classes, which support a limited degree of interaction with the garbage collector.
java.lang.reflect	Provides classes and interfaces for obtaining reflective information about classes and objects.
java.math	Provides classes for performing arbitrary-precision integer arithmetic (BigInteger) and arbitrary-precision decimal arithmetic (BigDecimal).
java.net
java.nio
java.nio.charset
java.security
java.text
java.util
java.util.concurrent	Utility classes commonly useful in concurrent programming.
java.util.concurrent.atomic	A small toolkit of classes that support lock-free thread-safe programming on single variables.
java.util.concurrent.locks	Interfaces and classes providing a framework for locking and waiting for conditions that is distinct from built-in synchronization and monitors.
java.util.function	Functional interfaces provide target types for lambda expressions and method references.
java.util.logging
java.util.regex	Classes for matching character sequences against patterns specified by regular expressions.
java.util.stream	Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.
javax.annotation.processing
org.apidesign.bck2brwsr.launcher.b2b
org.apidesign.bck2brwsr.launcher.impl
org.apidesign.vm4brwsr
org.apidesign.vm4brwsr.api
org.netbeans.modules.openide.util
org.openide.util	Client API part of the Lookup interfaces.
org.openide.util.lookup	Support classes for the Registration and Lookup extension mechanism.
org.openide.util.lookup.implspi	Interfaces intended to be used within the NetBeans Platform.

Classes in java.lang used by java.beans

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.
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.io

Class and Description
Appendable An object to which char sequences and values can be appended.
AutoCloseable A resource that must be closed when it is no longer needed.
CharSequence A CharSequence is a readable sequence of char values.
Class Instances of the class Class represent classes and interfaces in a running Java application.
ClassNotFoundException Thrown when an application tries to load in a class through its string name using: The forName method in class Class.
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Deprecated A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
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.
Readable A Readable is a source of characters.
SecurityException Thrown by the security manager to indicate a security violation.
String The String class represents character strings.
StringBuffer A thread-safe, 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 An object to which char sequences and values can be appended.
Boolean The Boolean class wraps a value of the primitive type boolean in an object.
Byte The Byte class wraps a value of primitive type byte in an object.
Character The Character class wraps a value of the primitive type char in an object.
CharSequence A CharSequence is a readable sequence of char values.
Class Instances of the class Class represent classes and interfaces in a running Java application.
ClassFormatError Thrown when the Java Virtual Machine attempts to read a class file and determines that the file is malformed or otherwise cannot be interpreted as a class file.
ClassLoader A class loader is an object that is responsible for loading classes.
ClassNotFoundException Thrown when an application tries to load in a class through its string name using: The forName method in class Class.
CloneNotSupportedException Thrown to indicate that the clone method in class Object has been called to clone an object, but that the object's class does not implement the Cloneable interface.
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Deprecated A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
Double The Double class wraps a value of the primitive type double in an object.
Enum This is the common base class of all Java language enumeration types.
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 An IllegalAccessException is thrown when an application tries to reflectively create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor.
IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument.
IncompatibleClassChangeError Thrown when an incompatible class change has occurred to some class definition.
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.
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 occupied, and the thread is interrupted, either before or during the activity.
LinkageError Subclasses of LinkageError indicate that a class has some dependency on another class; however, the latter class has incompatibly changed after the compilation of the former class.
Long The Long class wraps a value of the primitive type long in an object.
NoSuchMethodException Thrown when a particular method cannot be found.
Number The abstract class Number is the superclass of classes BigDecimal, BigInteger, Byte, Double, Float, Integer, Long, and Short.
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 Indicates that a method declaration is intended to override a method declaration in a supertype.
Package Package objects contain version information about the implementation and specification of a Java package.
ReflectiveOperationException Common superclass of exceptions thrown by reflective operations in core reflection.
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.
SecurityException Thrown by the security manager to indicate a security violation.
Short The Short class wraps a value of primitive type short in an object.
StackTraceElement An element in a stack trace, as returned by Throwable.getStackTrace().
String The String class represents character strings.
StringBuffer A thread-safe, mutable sequence of characters.
StringBuilder A mutable sequence of characters.
System.Logger.Level
Thread A thread is a thread of execution in a program.
Thread.State A thread state.
Thread.UncaughtExceptionHandler Interface for handlers invoked when a Thread abruptly terminates due to an uncaught exception.
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.
Void The Void class is an uninstantiable placeholder class to hold a reference to the Class object representing the Java keyword void.

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 imposes a total ordering on the objects of each class that implements it.
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.
ClassLoader A class loader is an object that is responsible for loading classes.
IllegalAccessException An IllegalAccessException is thrown when an application tries to reflectively create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor.
IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument.
NoSuchMethodException Thrown when a particular method cannot be found.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
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
IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument.
InterruptedException Thrown when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted, either before or during the activity.
Object Class Object is the root of the class hierarchy.

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

Class and Description
ArrayIndexOutOfBoundsException Thrown to indicate that an array has been accessed with an illegal index.
Class Instances of the class Class represent classes and interfaces in a running Java application.
ClassLoader A class loader is an object that is responsible for loading classes.
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
IllegalAccessException An IllegalAccessException is thrown when an application tries to reflectively create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor.
IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument.
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.
NegativeArraySizeException Thrown if an application tries to create an array with negative size.
Object Class Object is the root of the class hierarchy.
ReflectiveOperationException Common superclass of exceptions thrown by reflective operations in core reflection.
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.
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.math

Class and Description
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Number The abstract class Number is the superclass of classes BigDecimal, BigInteger, Byte, Double, Float, Integer, Long, and Short.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
String The String class represents character strings.

Classes in java.lang used by java.net

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Deprecated A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
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.
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

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

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

Class and Description
Comparable This interface imposes a total ordering on the objects of each class that implements it.
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.
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.security

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.
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.text

Class and Description
Cloneable A class implements the Cloneable interface to indicate to the Object.clone() method that it is legal for that method to make a field-for-field copy of instances of that class.
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
Number The abstract class Number is the superclass of classes BigDecimal, BigInteger, Byte, Double, Float, Integer, Long, and Short.
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.
StringBuffer A thread-safe, 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.util

Class and Description
Boolean The Boolean class wraps a value of the primitive type boolean in an object.
Character The Character class wraps a value of the primitive type char in an object.
CharSequence A CharSequence is a readable sequence of char values.
Class Instances of the class Class represent classes and interfaces in a running Java application.
ClassLoader A class loader is an object that is responsible for loading classes.
Cloneable A class implements the Cloneable interface to indicate to the Object.clone() method that it is legal for that method to make a field-for-field copy of instances of that class.
CloneNotSupportedException Thrown to indicate that the clone method in class Object has been called to clone an object, but that the object's class does not implement the Cloneable interface.
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Deprecated A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
Double The Double class wraps a value of the primitive type double in an object.
Enum This is the common base class of all Java language enumeration types.
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.
FunctionalInterface An informative annotation type used to indicate that an interface type declaration is intended to be a functional interface as defined by the Java Language Specification.
IllegalAccessException An IllegalAccessException is thrown when an application tries to reflectively create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor.
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.
Integer The Integer class wraps a value of the primitive type int in an object.
Iterable Implementing this interface allows an object to be the target of the "for-each loop" statement.
Long The Long class wraps a value of the primitive type long in an object.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
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.
SafeVarargs A programmer assertion that the body of the annotated method or constructor does not perform potentially unsafe operations on its varargs parameter.
String The String class represents character strings.
SuppressWarnings Indicates that the named compiler warnings should be suppressed in the annotated element (and in all program elements contained in the annotated element).
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
Cloneable A class implements the Cloneable interface to indicate to the Object.clone() method that it is legal for that method to make a field-for-field copy of instances of that class.
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Exception The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
IllegalStateException Signals that a method has been invoked at an illegal or inappropriate time.
InterruptedException Thrown when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted, either before or during the activity.
Iterable Implementing this interface allows an object to be the target of the "for-each loop" statement.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
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 Indicates that the named compiler warnings should be suppressed in the annotated element (and in all program elements contained in the annotated element).
Thread A thread is a thread of execution in a program.
Thread.UncaughtExceptionHandler Interface for handlers invoked when a Thread abruptly terminates due to an uncaught exception.
Throwable The Throwable class is the superclass of all errors and exceptions in the Java language.
Void The Void class is an uninstantiable placeholder class to hold a reference to the Class object representing the Java keyword void.

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

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
Number The abstract class Number is the superclass of classes BigDecimal, BigInteger, Byte, Double, Float, Integer, Long, and Short.
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.

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

Class and Description
InterruptedException Thrown when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted, either before or during the activity.
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.
Thread A thread is a thread of execution in a program.

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

Class and Description
FunctionalInterface An informative annotation type used to indicate that an interface type declaration is intended to be a functional interface as defined by the Java Language Specification.
Object Class Object is the root of the class hierarchy.

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

Class and Description
Deprecated A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
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.
SecurityException Thrown by the security manager to indicate a security violation.
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.regex

Class and Description
CharSequence A CharSequence is a readable sequence of char values.
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.
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.
StringBuffer A thread-safe, 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.util.stream

Class and Description
AutoCloseable A resource that must be closed when it is no longer needed.
Boolean The Boolean class wraps a value of the primitive type boolean in an object.
CharSequence A CharSequence is a readable sequence of char values.
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Double The Double class wraps a value of the primitive type double 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.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
Runnable The Runnable interface should be implemented by any class whose instances are intended to be executed by a thread.
SafeVarargs A programmer assertion that the body of the annotated method or constructor does not perform potentially unsafe operations on its varargs parameter.
String The String class represents character strings.
SuppressWarnings Indicates that the named compiler warnings should be suppressed in the annotated element (and in all program elements contained in the annotated element).

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

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

Classes in java.lang used by org.apidesign.bck2brwsr.launcher.b2b

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

Classes in java.lang used by org.apidesign.bck2brwsr.launcher.impl

Class and Description
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.

Classes in java.lang used by org.apidesign.vm4brwsr

Class and Description
Appendable An object to which char sequences and values can be appended.
ClassLoader A class loader is an object that is responsible for loading classes.
Comparable This interface imposes a total ordering on the objects of each class that implements it.
Object Class Object is the root of the class hierarchy.
String The String class represents character strings.

Classes in java.lang used by org.apidesign.vm4brwsr.api

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.

Classes in java.lang used by org.netbeans.modules.openide.util

Class and Description
Iterable Implementing this interface allows an object to be the target of the "for-each loop" statement.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
Runnable The Runnable interface should be implemented by any class whose instances are intended to be executed by a thread.
String The String class represents character strings.
SuppressWarnings Indicates that the named compiler warnings should be suppressed in the annotated element (and in all program elements contained in the annotated element).

Classes in java.lang used by org.openide.util

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
Deprecated A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
String The String class represents character strings.

Classes in java.lang used by org.openide.util.lookup

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
ClassLoader A class loader is an object that is responsible for loading classes.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
Runnable The Runnable interface should be implemented by any class whose instances are intended to be executed by a thread.
String The String class represents character strings.

Classes in java.lang used by org.openide.util.lookup.implspi

Class and Description
Class Instances of the class Class represent classes and interfaces in a running Java application.
Deprecated A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
IllegalAccessException An IllegalAccessException is thrown when an application tries to reflectively create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor.
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.
Object Class Object is the root of the class hierarchy.
Override Indicates that a method declaration is intended to override a method declaration in a supertype.
String The String class represents character strings.