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JavaTM 2 Platform Std. Ed. v1.6.0

java.lang
Enum Thread.State

java.lang.Object
  extended by java.lang.Enum<Thread.State>
      extended by java.lang.Thread.State
All Implemented Interfaces:
Serializable, Comparable<Thread.State>
Enclosing class:
Thread

public static enum Thread.State
extends Enum<Thread.State>

A thread state. A thread can be in one of the following states:

  • NEW
    A thread that has not yet started is in this state.
  • RUNNABLE
    A thread executing in the Java virtual machine is in this state.
  • BLOCKED
    A thread that is blocked waiting for a monitor lock is in this state.
  • WAITING
    A thread that is waiting indefinitely for another thread to perform a particular action is in this state.
  • TIMED_WAITING
    A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state.
  • TERMINATED
    A thread that has exited is in this state.

A thread can be in only one state at a given point in time. These states are virtual machine states which do not reflect any operating system thread states.

Since:
1.5
See Also:
Thread.getState()

Enum Constant Summary
BLOCKED
          Thread state for a thread blocked waiting for a monitor lock.
NEW
          Thread state for a thread which has not yet started.
RUNNABLE
          Thread state for a runnable thread.
TERMINATED
          Thread state for a terminated thread.
TIMED_WAITING
          Thread state for a waiting thread with a specified waiting time.
WAITING
          Thread state for a waiting thread.
 
Method Summary
static Thread.State valueOf(String name)
          Returns the enum constant of this type with the specified name.
static Thread.State[] values()
          Returns an array containing the constants of this enum type, in the order they are declared.
 
Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Enum Constant Detail

NEW

public static final Thread.State NEW
Thread state for a thread which has not yet started.


RUNNABLE

public static final Thread.State RUNNABLE
Thread state for a runnable thread. A thread in the runnable state is executing in the Java virtual machine but it may be waiting for other resources from the operating system such as processor.


BLOCKED

public static final Thread.State BLOCKED
Thread state for a thread blocked waiting for a monitor lock. A thread in the blocked state is waiting for a monitor lock to enter a synchronized block/method or reenter a synchronized block/method after calling Object.wait.


WAITING

public static final Thread.State WAITING
Thread state for a waiting thread. A thread is in the waiting state due to calling one of the following methods:

A thread in the waiting state is waiting for another thread to perform a particular action. For example, a thread that has called Object.wait() on an object is waiting for another thread to call Object.notify() or Object.notifyAll() on that object. A thread that has called Thread.join() is waiting for a specified thread to terminate.


TIMED_WAITING

public static final Thread.State TIMED_WAITING
Thread state for a waiting thread with a specified waiting time. A thread is in the timed waiting state due to calling one of the following methods with a specified positive waiting time:


TERMINATED

public static final Thread.State TERMINATED
Thread state for a terminated thread. The thread has completed execution.

Method Detail

values

public static Thread.State[] values()
Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
for (Thread.State c : Thread.State.values())
    System.out.println(c);

Returns:
an array containing the constants of this enum type, in the order they are declared

valueOf

public static Thread.State valueOf(String name)
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:
name - the name of the enum constant to be returned.
Returns:
the enum constant with the specified name
Throws:
IllegalArgumentException - if this enum type has no constant with the specified name
NullPointerException - if the argument is null

Copyright 2003 Sun Microsystems, Inc. All rights reserved