多线程问题匿名内部类

public class ThreadD {

    public static void main(String args[]) {
        MyThread r = new MyThread();
        // r.start();
        // Runable接口作为匿名内部类使用时，多线程未启动，原因是什么呢
        Runnable x = new Runnable() {
            public void run() {
                for (int i = 0; i < 500; i++) {
                    System.out.println("-------------------------" + i);
                }

            }
        };
        Thread t = new Thread(x);
        t.start();
        for (int i = 0; i < 500; i++) {
            System.out.println("中" + i);

        }
    }

    // 实现方法使用
    public static class Myrunable implements Runnable {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            for (int i = 0; i < 500; i++) {
                System.out.println("-------------------------" + i);

            }
        }

    }
}