Java中Thread类基本用法详解

//继承Thread类并重写run方法创建一个线程
class Thread01 extends Thread{
    @Override
    public void run() {
        System.out.println("hello,thread");
    }
}
public class ThreadDemo {
    public static void main(String[] args) {
        //实例化一个线程对象
        Thread01 t=new Thread01();
        //真正去申请系统线程，参与CPU调度
        t.start();
    }
}

//通过继承Runnable接口并实现run方法
class MyRunnable implements Runnable{
    @Override
    public void run() {
        System.out.println("hello,thread");
    }
}
public class ThreadDemo {
    public static void main(String[] args) {
         //实例化Runnable对象
        MyRunnable runnable=new MyRunnable();
        //实例化线程对象并绑定任务
        Thread t=new Thread(runnable);
        t.start();
    }
}

 //通过Thread匿名内部类的方法创建一个线程
public static void main(String[] args) {
       Thread t=new Thread(){
            //指定线程任务
            @Override
            public void run() {
                System.out.println(Thread.currentThread().getName());
            }
        };
        t.start();
}

//通过Runnable匿名内部类创建一个线程
   public static void main(String[] args) {
      Thread t=new Thread(new Runnable() {
          //指定线程的任务
          @Override
          public void run() {
              System.out.println(Thread.currentThread().getName());
          }
      });
      t.start();
   }

//通过Lambda表达式的方式创建一个线程
public static void main(String[] args) {
    Thread t=new Thread(()->{
        System.out.println("Hi");
    });
    t.start();
}

    public static boolean flag=true;
    public static void main(String[] args) throws InterruptedException {
        Thread t=new Thread(()->{
            while (flag){
                System.out.println("hello Thread");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });
        t.start();
        Thread.sleep(3000);
        //在主线程里就可以随时通过flag变量的取值，来操作t线程是否结束
        flag=false;
    }

public static void main(String[] args) throws InterruptedException {
    Thread t=new Thread(()->{
        while (!Thread.currentThread().isInterrupted()){
            System.out.println("hello Thread");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    });
    t.start();
    Thread.sleep(3000);
    t.interrupt();
}