THE PACKAGE JAVA.LANG

java.lang.ThreadGroup

20.21

20.21.13

public final void setMaxPriority(int newMaxPriority)

throws SecurityException, IllegalArgumentException

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).

If the

newMaxPriority

 argument is less than

MIN_PRIORITY

 ( 20.20.1) or

greater than

MAX_PRIORITY

 ( 20.20.2), then an

IllegalArgumentException

 is

thrown.

Otherwise, the priority of this

ThreadGroup

 object is set to the smaller of the

specified

newMaxPriority

 and the maximum permitted priority ( 20.21.12) of

the parent of this thread group ( 20.21.12). (If this thread group is the system

thread group, which has no parent, then its maximum priority is simply set to

newMaxPriority

.) Then this method is called recursively, with

newMaxPriority

as its argument, for every thread group that belongs to this thread group.

20.21.14

public final boolean isDaemon()

The result is

true

 if and only if this thread group is currently marked as a daemon

thread group.

20.21.15

public final void setDaemon(boolean daemon)

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).

This thread group is marked as being a daemon thread group if the argument

is

true

, and as not being a daemon thread group if the argument is

false

.

20.21.16

public int threadsCount()

This method returns the number of threads that directly belong to this thread

group.

20.21.17

public int allThreadsCount()

This method returns the number of threads that belong to this thread group or to

any of its subgroups.

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