Enum Class Thread.State
- All Implemented Interfaces:
Serializable
,Comparable<Thread.State>
,Constable
- Enclosing class:
Thread
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:
-
Nested Class Summary
Nested classes/interfaces inherited from class java.lang.Enum
Enum.EnumDesc<E extends Enum<E>>
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Enum Constant Summary
Enum ConstantDescriptionThread state for a thread blocked waiting for a monitor lock.Thread state for a thread which has not yet started.Thread state for a runnable thread.Thread state for a terminated thread.Thread state for a waiting thread with a specified waiting time.Thread state for a waiting thread. -
Method Summary
Modifier and TypeMethodDescriptionstatic Thread.State
Returns the enum constant of this class with the specified name.static Thread.State[]
values()
Returns an array containing the constants of this enum class, in the order they are declared.
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Enum Constant Details
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NEW
Thread state for a thread which has not yet started. -
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
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 callingObject.wait
. -
WAITING
Thread state for a waiting thread. A thread is in the waiting state due to calling one of the following methods:Object.wait
with no timeoutThread.join
with no timeoutLockSupport.park
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 callObject.notify()
orObject.notifyAll()
on that object. A thread that has calledThread.join()
is waiting for a specified thread to terminate. -
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:Thread.sleep
Object.wait
with timeoutThread.join
with timeoutLockSupport.parkNanos
LockSupport.parkUntil
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TERMINATED
Thread state for a terminated thread. The thread has completed execution.
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Method Details
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values
Returns an array containing the constants of this enum class, in the order they are declared.- Returns:
- an array containing the constants of this enum class, in the order they are declared
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valueOf
Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified nameNullPointerException
- if the argument is null
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