[Java] Java簡單的Sleep使用

public class test implements Runnable {

    Thread th;

    public void run() {
            try {
		System.out.printf("100");
                Thread.sleep(1000);
                System.out.printf("\r");
                Thread.sleep(1000);
                System.out.printf("200");
            } catch (Exception e) {
                System.out.println(e);
            }

    }

    public static void main(String[] args) throws Exception {
        Thread th = new Thread(new test());
        th.start();
    }
}