java线程实现的两个方式

//方式一
public class TestThread1 {
    public static void main(String args[]) {
        Runner1 r = new Runner1();
        r.start();
        
        for(int i=0; i<100; i++) {
            System.out.println("Main Thread:------" + i);
        }
    }
}

class Runner1 extends Thread {
    public void run() {
        for(int i=0; i<100; i++) {
            System.out.println("Thread:" + i);
        }
    }
}

//能使用接口就不用从Thread类继承
//方式二
public class TestThread1 {
    public static void main(String args[]) {
        Runner1 r = new Runner1();
        r.run();
        Thread t = new Thread(r);
        t.start();
        
        for(int i=0; i<50; i++) {
            System.out.println("Main Thread:------" + i);
        }
    }
}

class Runner1 implements Runnable {
    public void run() {
        for(int i=0; i<50; i++) {
            System.out.println("Thread: " + i);
        }
    }
}