public class ThreadTest_syn implements Runnable {
private String name;
private Object prev;
private Object self;
private ThreadTest_syn(String name, Object prev, Object self) {
this.name = name;
this.prev = prev;
this.self = self;
}
@Override
public void run() {
int count = 10;
while (count > 0) {
//先拥有前一个锁对象
synchronized (prev) {
//在拥有自身锁对象
synchronized (self) {
System.out.print(name);
count--;
//释放自身锁
self.notify();
}
try {
//释放前一个锁对象
prev.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public static void main(String[] args) throws Exception {
Object a = new Object();
Object b = new Object();
Object c = new Object();
ThreadTest_syn pa = new ThreadTest_syn("A", c, a);
ThreadTest_syn pb = new ThreadTest_syn("B", a, b);
ThreadTest_syn pc = new ThreadTest_syn("C", b, c);
new Thread(pa).start();
Thread.sleep(100); //确保按顺序A、B、C执行
new Thread(pb).start();
Thread.sleep(100);
new Thread(pc).start();
Thread.sleep(100);
}
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