线程进入运行状态之后，可以根据条件触发转为“等待阻塞”：

运行的线程执行wait()方法，该线程会释放占用的所有资源，JVM会把该线程放入“等待池”中。进入这个状态后，是不能自动唤醒的，必须依靠其他线程调用notify()或notifyAll()方法才能被唤醒，

 

如下代码：

1、定义两个测试线程类

public class WaitTest1 extends Thread {
	private Object look;
 
	public WaitTest1(Object look) {
		this.look = look;
	}
 
	@Override
	public void run() {
		try {
			synchronized (look) {
				System.out.println("wait start...");
				look.wait();
				System.out.println("wait end...");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
 
public class WaitTest2 extends Thread {
 
	private Object look;
 
	public WaitTest2(Object look) {
		this.look = look;
	}
 
	@Override
	public void run() {
		try {
			synchronized (look) {
				System.out.println("notify start...");
				look.notify();
				System.out.println("notify end...");
			}
		} catch (Exception e) {