68 lines
1.1 KiB
Java
68 lines
1.1 KiB
Java
// Many threads join a single thread.
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class Sleeper implements Runnable
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{
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int num = -1;
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public Sleeper(int num)
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{
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this.num = num;
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}
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public void run()
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{
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System.out.println("sleeping");
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try
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{
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Thread.sleep(500);
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}
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catch (InterruptedException x)
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{
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System.out.println("sleep() interrupted");
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}
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System.out.println("done");
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}
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}
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class Joiner implements Runnable
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{
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Thread join_target;
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public Joiner(Thread t)
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{
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this.join_target = t;
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}
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public void run()
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{
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try
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{
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long start = System.currentTimeMillis();
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join_target.join(2000);
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if ((System.currentTimeMillis() - start) > 1900)
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System.out.println("Error: Join timed out");
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else
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System.out.println("ok");
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}
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catch (InterruptedException x)
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{
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System.out.println("join() interrupted");
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}
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}
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}
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public class Thread_Join
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{
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public static void main(String[] args)
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{
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Thread primary = new Thread(new Sleeper(1));
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primary.start();
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for (int i=0; i < 10; i++)
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{
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Thread t = new Thread(new Joiner(primary));
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t.start();
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}
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}
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}
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