public class MyThread extends Thread {

    public MyThread(String name) {
        super(name);
    }

    public void run() {
        for(int i=0;i<5;i++){
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(super.getName()+":启动线程...");
        }
    }
}

public class MyThread2 extends Thread {
    public MyThread2(String name) {
        super(name);
    }

    public void run() {
        for(int i=0;i<5;i++){
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(super.getName()+":启动线程...");
        }
    }
}

public class TestThread {
    public static void main(String[] args) throws InterruptedException {

        MyThread2 myThread2 = new MyThread2("线程2");
        myThread2.start();
        Thread.sleep(2000);
        test1();
        test();
        System.out.println("当前线程："+Thread.currentThread().getName());//当前线程名字

        MyThread myThread = new MyThread("线程1");
        myThread.start();

        // 匿名内部线程实现runnable
        Runnable r = new Runnable() {
            public void run() {
                System.out.println("匿名Runable.....");
            }
        };
        new Thread(r).start();
        // 匿名内部类
        new Thread() {
            public void run() {
                System.out.println("匿名Thread......");
            }
        }.start();
    }

    public static void test() {
        System.out.println("test....");
    }

    public static void test1() {
        System.out.println("test1....");
    }
}

结果：
线程2:启动线程...
线程2:启动线程...
线程2:启动线程...
test1....
test....
当前线程：main
线程2:启动线程...
匿名Runable.....
匿名Thread......
线程2:启动线程...
线程1:启动线程...
线程1:启动线程...
线程1:启动线程...
线程1:启动线程...
线程1:启动线程...