java线程 notify无法解除 wait阻塞

Question

java线程waitnotify

Answer 1

synchronized (this) {
                    System.out.println("---------------------");
                    this.wait();
                    System.out.println("++++++++++++++++++++++");
                }你这个线程wait的时候，已经锁住了this对象了，public void jixu(int num) {
        this.num = num;
        synchronized (this) {
            this.notify();
        }
    }所以这里的代码根本就进不去，notify肯定起不到效果了。

Answer 2

public class OutputThreadTest implements Runnable {
    public void run() {
        test2 test2 = new test2();
        test2.start();
        try {
Thread.sleep(1000);
//在这睡1s
//如果不睡，test2.jixu(22)可能在test2这个线程启动前，就已经执行了
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
        test2.jixu(22);
    }    public static void main(String[] args) {
        Thread thread1 = new Thread(new OutputThreadTest());
        thread1.start();
    }
}class test2 extends Thread {
    private int num = 0;    public void jixu(int num) {
        this.num = num;
        synchronized (this) {
            this.notify();
        }
    }    public void run() {
        try {
            while (true) {
                synchronized (this) {
                    System.out.println("---------------------");
                    this.wait();
                    System.out.println("++++++++++++++++++++++");
                }
                System.out.println(num);
            }
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }    }
}

Answer 3

wait notify 配合使用和synchronized一样的效果
你都使用，有点逗

Answer 4

我的建议，用了synchronized就去掉wait和notify,要么去掉synchronized，你试试