Java主线程等待子线程、线程池

public class TestThread extends Thread
{
	public void run()
	{
		System.out.println(this.getName() + "子线程开始");
		try
		{
			// 子线程休眠五秒
			Thread.sleep(5000);
		}
		catch (InterruptedException e)
		{
			e.printStackTrace();
		}
		System.out.println(this.getName() + "子线程结束");
	}
}
public class TestThread extends Thread
{
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