线程交替打印奇偶
class TestThread implements Runnable {
private int i = 1;
public void run() {
while (true) {
synchronized (this) {
notify();
System.out.println(Thread.currentThread().getName() + ":" + i++);
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
if (i == 101) {
notify();//线程2执行完输出100后,进行等待池,线程1被唤醒拿到锁从wait()后面开始执行,此时i=101,需要先把线程2从等待池唤醒再结束循环
break;
}
}
}
}
}
public class Test7 {
public static void main(String[] args) {
TestThread t = new TestThread();
Thread t1 = new Thread(t);
Thread t2 = new Thread(t);
t1.setName("线程1");
t2.setName("线程2");
t1.start();
//把线程2延迟一会开启,为了始终让线程1先拿到锁
try {
Thread.sleep(5);
} catch (InterruptedException e) {
e.printStackTrace();
}
t2.start();
}
}