| Package | Description | 
|---|---|
| java.lang | Provides classes that are fundamental to the design of the Java
 programming language. | 
| java.util.concurrent | Utility classes commonly useful in concurrent programming. | 
| 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. | 
| javax.swing.text | Provides classes and interfaces that deal with editable
and noneditable text components. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Thread | Thread. currentThread()Returns a reference to the currently executing thread object. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Map<Thread,StackTraceElement[]> | Thread. getAllStackTraces()Returns a map of stack traces for all live threads. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | Runtime. addShutdownHook(Thread hook)Registers a new virtual-machine shutdown hook. | 
| void | SecurityManager. checkAccess(Thread t)Throws a  SecurityExceptionif the
 calling thread is not allowed to modify the thread argument. | 
| static int | Thread. enumerate(Thread[] tarray)Copies into the specified array every active thread in the current
 thread's thread group and its subgroups. | 
| int | ThreadGroup. enumerate(Thread[] list)Copies into the specified array every active thread in this
 thread group and its subgroups. | 
| int | ThreadGroup. enumerate(Thread[] list,
         boolean recurse)Copies into the specified array every active thread in this
 thread group. | 
| boolean | Runtime. removeShutdownHook(Thread hook)De-registers a previously-registered virtual-machine shutdown hook. | 
| void | Thread.UncaughtExceptionHandler. uncaughtException(Thread t,
                 Throwable e)Method invoked when the given thread terminates due to the
 given uncaught exception. | 
| void | ThreadGroup. uncaughtException(Thread t,
                 Throwable e)Called by the Java Virtual Machine when a thread in this
 thread group stops because of an uncaught exception, and the thread
 does not have a specific  Thread.UncaughtExceptionHandlerinstalled. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ForkJoinWorkerThreadA thread managed by a  ForkJoinPool, which executesForkJoinTasks. | 
| Modifier and Type | Method and Description | 
|---|---|
| Thread | ThreadFactory. newThread(Runnable r)Constructs a new  Thread. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected Collection<Thread> | Semaphore. getQueuedThreads()Returns a collection containing threads that may be waiting to acquire. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected void | ThreadPoolExecutor. beforeExecute(Thread t,
             Runnable r)Method invoked prior to executing the given Runnable in the
 given thread. | 
| void | TimeUnit. timedJoin(Thread thread,
         long timeout)Performs a timed  Thread.joinusing this time unit. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected Thread | AbstractOwnableSynchronizer. getExclusiveOwnerThread()Returns the thread last set by  setExclusiveOwnerThread,
 ornullif never set. | 
| Thread | AbstractQueuedLongSynchronizer. getFirstQueuedThread()Returns the first (longest-waiting) thread in the queue, or
  nullif no threads are currently queued. | 
| Thread | AbstractQueuedSynchronizer. getFirstQueuedThread()Returns the first (longest-waiting) thread in the queue, or
  nullif no threads are currently queued. | 
| protected Thread | ReentrantLock. getOwner()Returns the thread that currently owns this lock, or
  nullif not owned. | 
| protected Thread | ReentrantReadWriteLock. getOwner()Returns the thread that currently owns the write lock, or
  nullif not owned. | 
| Modifier and Type | Method and Description | 
|---|---|
| Collection<Thread> | AbstractQueuedLongSynchronizer. getExclusiveQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire in exclusive mode. | 
| Collection<Thread> | AbstractQueuedSynchronizer. getExclusiveQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire in exclusive mode. | 
| protected Collection<Thread> | ReentrantReadWriteLock. getQueuedReaderThreads()Returns a collection containing threads that may be waiting to
 acquire the read lock. | 
| protected Collection<Thread> | ReentrantLock. getQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire this lock. | 
| Collection<Thread> | AbstractQueuedLongSynchronizer. getQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire. | 
| Collection<Thread> | AbstractQueuedSynchronizer. getQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire. | 
| protected Collection<Thread> | ReentrantReadWriteLock. getQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire either the read or write lock. | 
| protected Collection<Thread> | ReentrantReadWriteLock. getQueuedWriterThreads()Returns a collection containing threads that may be waiting to
 acquire the write lock. | 
| Collection<Thread> | AbstractQueuedLongSynchronizer. getSharedQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire in shared mode. | 
| Collection<Thread> | AbstractQueuedSynchronizer. getSharedQueuedThreads()Returns a collection containing threads that may be waiting to
 acquire in shared mode. | 
| protected Collection<Thread> | AbstractQueuedLongSynchronizer.ConditionObject. getWaitingThreads()Returns a collection containing those threads that may be
 waiting on this Condition. | 
| protected Collection<Thread> | AbstractQueuedSynchronizer.ConditionObject. getWaitingThreads()Returns a collection containing those threads that may be
 waiting on this Condition. | 
| Collection<Thread> | AbstractQueuedLongSynchronizer. getWaitingThreads(AbstractQueuedLongSynchronizer.ConditionObject condition)Returns a collection containing those threads that may be
 waiting on the given condition associated with this
 synchronizer. | 
| Collection<Thread> | AbstractQueuedSynchronizer. getWaitingThreads(AbstractQueuedSynchronizer.ConditionObject condition)Returns a collection containing those threads that may be
 waiting on the given condition associated with this
 synchronizer. | 
| protected Collection<Thread> | ReentrantLock. getWaitingThreads(Condition condition)Returns a collection containing those threads that may be
 waiting on the given condition associated with this lock. | 
| protected Collection<Thread> | ReentrantReadWriteLock. getWaitingThreads(Condition condition)Returns a collection containing those threads that may be
 waiting on the given condition associated with the write lock. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Object | LockSupport. getBlocker(Thread t)Returns the blocker object supplied to the most recent
 invocation of a park method that has not yet unblocked, or null
 if not blocked. | 
| boolean | ReentrantLock. hasQueuedThread(Thread thread)Queries whether the given thread is waiting to acquire this
 lock. | 
| boolean | ReentrantReadWriteLock. hasQueuedThread(Thread thread)Queries whether the given thread is waiting to acquire either
 the read or write lock. | 
| boolean | AbstractQueuedLongSynchronizer. isQueued(Thread thread)Returns true if the given thread is currently queued. | 
| boolean | AbstractQueuedSynchronizer. isQueued(Thread thread)Returns true if the given thread is currently queued. | 
| protected void | AbstractOwnableSynchronizer. setExclusiveOwnerThread(Thread thread)Sets the thread that currently owns exclusive access. | 
| static void | LockSupport. unpark(Thread thread)Makes available the permit for the given thread, if it
 was not already available. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected Thread | AbstractDocument. getCurrentWriter()Fetches the current writing thread if there is one. | 
 Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
 Copyright © 1993, 2015, Oracle and/or its affiliates.  All rights reserved.