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Article #24596

Re: chat room

#24596
From: SqCW97
Date: Wed, 07 Jan 1998 00:00
82 lines
5244 bytes
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: ����������ͷţ�destroy()����������ʲô�á��̵߳Ľ���
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:         �ȷ�˵��
:         class SubThread extends Thread{
:                 Object object1;
:                 ...
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:                 ...
:                 }
:                 ...
:         }
:         ����һ��Thread �����࣬�������н��������ռ���ڴ�
: �ͷų����������е�Object1��������̵߳�ֹͣ���ڴ��ͷ�
: Ӧ���������°�?�Ҿ���java���ڵ�û�б���ָ��һ������ʱ,����
: ���ͷ����������ռ���ڴ档

����ϸ�����룬֮���Կ�����clockThread==myThread���жϣ�������Ϊ
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<pre>

----------------------------------------------
public void destroy()

     Destroys this thread, without any cleanup. Any monitors it has locked remain
     locked. (This method is not implemented.) 


----------------------------------------------
public final void stop()

     Note: stop() is deprecated. 

     Forces the thread to stop executing. This method has been deprecated, as it is
     inherently unsafe. Stopping a thread with Thread.stop causes it to unlock all of
     the monitors that it has locked (as a natural consequence of the unchecked
     ThreadDeath exception propagating up the stack). If any of the objects previously
     protected by these monitors were in an inconsistent state, the damaged objects
     become visible to other threads, potentially resulting in arbitrary behavior.
     Many uses of stop should be replaced by code that simply modifies some variable
     to indicate that the target thread should stop running. The target thread should
     check this variable regularly, and return from its run method in an orderly
     fashion if the variable indicates that it is to stop running. If the target
     thread waits for long periods (e.g., for input), the interrupt method should be
     used to interrupt the wait. 

     First, the checkAccess method of this thread is called with no arguments. This
     may result in throwing a SecurityException (in the current thread). 

     The thread represented by this thread is forced to stop whatever it is doing
     abnormally and to throw a newly created ThreadDeath object as an exception. 

     It is permitted to stop a thread that has not yet been started. If the thread is
     eventually started, it immediately terminates. 

     An application should not normally try to catch ThreadDeath unless it must do
     some extraordinary cleanup operation (note that the throwing of ThreadDeath
     causes finally clauses of try statements to be executed before the thread
     officially dies). If a catch clause catches a ThreadDeath object, it is important
     to rethrow the object so that the thread actually dies. 

     The top-level error handler that reacts to otherwise uncaught exceptions does
     not print out a message or otherwise notify the application if the uncaught
     exception is an instance of ThreadDeath. 
</pre>

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From: dayou.bbs@bbs.nease.net (SqCW97)
Subject: Re: chat room
Date: 1998/01/07
Message-ID: <3MQYVg$6ug@bbs.nease.net>
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