20.20

java.lang.Thread

THE PACKAGE JAVA.LANG

20.20.26

public final boolean isAlive()

The result is

true

 if and only if this thread is alive (it has been started and has not

yet died).

20.20.27

public int countStackFrames()

This method returns the number of Java Virtual Machine stack frames currently

active for this thread.

20.20.28

public final void join() throws InterruptedException

This method causes the current thread to wait (using the

wait

 method ( 20.1.6) of

class

Object

) until this thread is no longer alive.

If the current thread is interrupted ( 20.20.31) by another thread while it is

waiting, then the wait is ended and an

InterruptedException

 is thrown.

20.20.29

public final void join(long millis)

throws InterruptedException

This method causes the current thread to wait (using the

wait

 method ( 20.1.7) of

class

Object

) until either this thread is no longer alive or a certain amount of real

time has elapsed, more or less.

The amount of real time, measured in milliseconds, is given by

millis

. If

millis

 is zero, however, then real time is not taken into consideration and this

method simply waits until this thread is no longer alive.

If the current thread is interrupted ( 20.20.31) by another thread while it is

waiting, then the wait is ended and an

InterruptedException

 is thrown.

20.20.30

public final void join(long millis, int nanos)

throws InterruptedException

This method causes the current thread to wait (using the

wait

 method ( 20.1.8) of

class

Object

) until either this thread is no longer alive or a certain amount of real

time has elapsed, more or less.

The amount of real time, measured in nanoseconds, is given by:

1000000*millis+nanos

598