日期:2014-05-20  浏览次数:20794 次

一个关于线程的问题:线程停止以后,就会被回收吗?
各位好

Java code

public class Testing
{
    private static TestThread tester;

    class TestThread extends Thread
    {
        private int index = 0;

        private boolean running = true;

        @Override
        public void run()
        {
            while (running)
            {
                System.out.println("" + ++index);
                try
                {
                    Thread.sleep(500);
                }
                catch (InterruptedException e)
                {
                    e.printStackTrace();
                }
            }
        }

        public void setRunning(boolean running)
        {
            this.running = running;
        }
    }

    public static void main(String[] args)
    {
        // 开启线程
        tester = new TestThread();
        tester.start();

        // 消毁线程
        tester.setRunning(false);
        tester = null;



我想达到的效果是,使tester所指向的线程销毁掉,看网上说,直接调用stop()方法并不好,最好是在run()里自然地stop,所以设置了一个running变量。

我想问的是,这个线程stop以后,就会被回收了,或是被destroy了吗?

------解决方案--------------------
对了 你怕被回收的话可以做个单列模式撒,
------解决方案--------------------
可以通过Thread.getState()来看一下什么状态
枚举类表示中总共有以下这些状态
还有就像1楼说的可以重新start,我想run完后应该算是TERMINATED状态

public static enum Thread.State
extends Enum<Thread.State>

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.
------解决方案--------------------
这种方式是比较好点,我也经常采用这种方式。线程中断也就停止了。