Question

我有两个线程t0和t1，下面分别在代码部分Run_0和Run1中发布了runnables。我想要做的是，当t0写入或执行持续7秒的任务时，t1应该等待。当时经过7秒后，应通知t1继续工作。我尝试使用wait（）和notify（）来做到这一点，但在运行时我收到以下发布的错误。

请让我知道如何正确使用wait（）和notify（）

码：

public static void main(String[] args) {

    t0 = new Thread(new Run_0());
    t1 = new Thread(new Run_1());

    t0.start();
    t1.start();
}

private static class Run_0 implements Runnable {
    public void run() {
        // TODO Auto-generated method stub

        while (true) {
            long startTime = TimeUtils.getTSSec();
            synchronized (this) {
                try {
                    t1.wait(); //<=========Line 27
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

            System.out.println("T0 is writing");
            //simulate doing some work
            while( (TimeUtils.getTSSec()-startTime) <= 7) {

            }
            System.out.println("T0 finished writing");
            t1.notify();
            startTime = TimeUtils.getTSSec();

            while( (TimeUtils.getTSSec()-startTime) <= 7) {

            }
        }

    }

}

private static class Run_1 implements Runnable {

    public void run() {
        // TODO Auto-generated method stub

        while(true) {

            System.out.println("T1 is working");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}

错误：

Exception in thread "Thread-0" java.lang.IllegalMonitorStateException
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Unknown Source)
at com.example.Main$Run_0.run(Main.java:27)
at java.lang.Thread.run(Unknown Source)

wait（）和notify（）导致IllegalMonitorStateException

0 个答案: