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Summary: Ctors | Methods | Protected Methods | Inherited Methods | [Expand All]

Since: API Level 1

public class

ThreadLocal

extends Object

java.lang.Object
↳	java.lang.ThreadLocal<T>

Known Direct Subclasses

InheritableThreadLocal<T>

Class Overview

Implements a thread-local storage, that is, a variable for which each thread has its own value. All threads share the same ThreadLocal object, but each sees a different value when accessing it, and changes made by one thread do not affect the other threads. The implementation supports null values.

Summary

Public Constructors
	ThreadLocal() Creates a new thread-local variable.

Public Methods
T	get() Returns the value of this variable for the current thread.
void	remove() Removes the entry for this variable in the current thread.
void	set(T value) Sets the value of this variable for the current thread.

Protected Methods
T	initialValue() Provides the initial value of this variable for the current thread.

[Expand]

Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public ThreadLocal ()

Since: API Level 1

Creates a new thread-local variable.

Public Methods

public T get ()

Since: API Level 1

Returns the value of this variable for the current thread. If an entry doesn't yet exist for this variable on this thread, this method will create an entry, populating the value with the result of initialValue().

Returns

the current value of the variable for the calling thread.

public void remove ()

Since: API Level 1

Removes the entry for this variable in the current thread. If this call is followed by a get() before a set(T), #get() will call initialValue() and create a new entry with the resulting value.

public void set (T value)

Since: API Level 1

Sets the value of this variable for the current thread. If set to null, the value will be set to null and the underlying entry will still be present.

Parameters

value	the new value of the variable for the caller thread.

Protected Methods

protected T initialValue ()

Since: API Level 1

Provides the initial value of this variable for the current thread. The default implementation returns null.

Returns

the initial value of the variable.

Results

Interfaces

Classes

Enums

Exceptions

Errors

ThreadLocal

Class Overview

See Also

Summary

Public Constructors

public ThreadLocal ()

Public Methods

public T get ()

Returns

public void remove ()

public void set (T value)

Parameters

Protected Methods

protected T initialValue ()

Returns