【Java多线程练习（三个线程顺序打印A,B,C）】回顾一下Java多线程,使用wait/notify 控制线程协调,三个线程顺序打印A,B,C 打印三次
package com.levin.lang;
public class Lock {
public static class PrintThread extends Thread {
private Object obj;
private volatile String str;
private int i = 0;
PrintThread(Object obj, String str) {
this.obj = obj;
this.str = str;
}@Override
public void run() {
synchronized (obj) {
while (i < 9) {
if (str.equals(currentThread().getName())) {
i++;
System.out.println(Thread.currentThread().getName());
switch (str) {
case "A":
str = "B";
break;
case "B":
str = "C";
break;
case "C":
str = "A";
break;
}
} else {
try {
obj.notifyAll();
obj.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
}public static void main(String[] args) {
Object lock = new Object();
String str = "A";
PrintThread p1 = new PrintThread(lock, str);
Thread t1 = new Thread(p1);
Thread t2 = new Thread(p1);
Thread t3 = new Thread(p1);
t1.setName("A");
t2.setName("B");
t3.setName("C");
t1.start();
t2.start();
t3.start();
}
}
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