这里的原理类似链表。
记录下一个的执行 flag，只有 flag 相同的时候，才会执行。
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| package com.redisc;
import lombok.extern.slf4j.Slf4j;
@Slf4j(topic = "c.Run")
public class Run {
public static void main(String[] args) throws Exception {
WaitNotify wn = new WaitNotify(1, 5);
new Thread(() -> {
wn.print("a", 1, 2);
}).start();
new Thread(() -> {
wn.print("b", 2, 3);
}).start();
new Thread(() -> {
wn.print("c", 3, 1);
}).start();
}
}
class WaitNotify {
private int flag;
private int loopNumber;
public WaitNotify(int flag, int loopNumber) {
this.flag = flag;
this.loopNumber = loopNumber;
}
public void print(String str, int waitFlag, int nextFlag) {
for (int i = 0; i < loopNumber; i++) {
synchronized (this) {
while (flag != waitFlag) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println(str);
flag = nextFlag;
this.notifyAll();
}
}
}
}
|
输出
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| a
b
c
a
b
c
a
b
c
a
b
c
a
b
c
|
