20.21

java.lang.ThreadGroup

THE PACKAGE JAVA.LANG

20.21.9

public final void suspend() throws SecurityException

First, the

checkAccess

 method ( 20.21.4) of this

ThreadGroup

 object is called

with no arguments. This may result in a

SecurityException

 being thrown (in

the current thread).

Every thread in this thread group or any of its subgroups is suspended. More

precisely, the method

suspend

 is called for every

ThreadGroup

 and every

Thread

 ( 20.20.17) that belongs to this

ThreadGroup

.

20.21.10

public final void resume() throws SecurityException

First, the

checkAccess

 method ( 20.21.4) of this

ThreadGroup

 object is called

with no arguments. This may result in a

SecurityException

 being thrown (in

the current thread).

Every thread in this thread group or any of its subgroups is resumed. More

precisely, the method

resume

 is called for every

ThreadGroup

 and every

Thread

( 20.20.18) that belongs to this

ThreadGroup

.

20.21.11

public final void destroy()

throws SecurityException, IllegalThreadStateException

First, the

checkAccess

 method ( 20.21.4) of this

ThreadGroup

 object is called

with no arguments. This may result in a

SecurityException

 being thrown (in

the current thread).

This thread group is destroyed. If it has already been destroyed, or if any

threads belong to it directly, then an

IllegalThreadStateException

 is thrown.

Otherwise, this method is called recursively for every thread group that belongs to

this thread group, and this thread group is removed from its parent thread group.

A thread group that is currently marked as a daemon thread group is destroyed

automatically if both of the following conditions are true:

A thread or thread group has just been removed from it (because the thread

has died or the thread group has been destroyed).

The thread group now contains no more threads or thread groups.

20.21.12

public final int getMaxPriority()

The current maximum priority of this

ThreadGroup

 object is returned.

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