Basic usage of Thread class

We know that multi-threads are executed concurrently in the current operating system, which will result in a series of various operations of threads. Let's quickly browse the various basic operations of threads;

1. Thread creation

There are many ways to create threads, the following are the recommended ways

Thread thread =new Thread(()->{
    System.out.println("thread begin");
);

2. Thread interruption

We can use Thread’s own flag bit

Thread thread=new Thread(()->{
            while (!Thread.currentThread().isInterrupted()){//静态方法，获取到当前线程的实例。
                System.out.println("线程运行ing......");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    //e.printStackTrace();
//                    1.立即退出
//                    break;
//                    2.稍后退出
                    System.out.println("线程即将退出");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException ex) {
                        ex.printStackTrace();
                    }
                    break;
                }
            }
            System.out.println("线程已经退出");
        });
        thread.start();
        Thread.sleep(5000);//sleep操作就是阻塞
        System.out.println("控制新线程退出");
        thread.interrupt();

3. Thread waiting (join)

The execution order between threads is completely random, depending on the system's scheduling. But we can control the ending order of two threads through join

//main等待t2,t2等待t1
        System.out.println("main begin");
        Thread t1=new Thread(()->{
            System.out.println("t1 begin");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("t1 end");
        });

        Thread t2=new Thread(()->{
            System.out.println("t2 begin");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("t2 end");
        });
        t1.start();
        t1.join();
        t2.start();
        t2.join();
        System.out.println("main end");

4. Thread sleep

Thread.slepp(1000); //Unit is milliseconds

5. Get the thread instance

call start

Basic usage of Thread class

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