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package ThreadTest;public class ThreeThread {    static class Node{        private int flag = 0;        private int index = 0;    }    static class Thread1 extends Thread{        Node node;        private final int threadId;        private final Object o = new Object();        public Thread1(int threadId, Node node){            this.threadId = threadId;            this.node = node;        }        @Override        public void run() {            while(node.index <= 10) {                synchronized (o) {                    if (threadId == node.flag) {                        System.out.println("线程ID:" + this.threadId + "打印: " + node.index++);                        node.flag = (node.index + 1) % 3;                    }                }            }        }    }    public void print(){    }    public static void main(String[] args){        Node node = new Node();        Thread1 t1 = new Thread1(0, node);        Thread1 t2 = new Thread1(1, node);        Thread1 t3 = new Thread1(2, node);        t1.start();        t2.start();        t3.start();    }}

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