showseconds.java

Java程序设计技巧与开发实例附书源代码。

import java.util.Date;

public class ShowSeconds
        implements Runnable {
    private Thread clocker = null;
    private Date now = new Date();

    public ShowSeconds() {
        clocker = new Thread(this);
        clocker.start();
    }

    public void run() {
        while (true) {
            now = new Date();
            System.out.println(now);
            try {
                clocker.sleep(1000);
            }
            catch (InterruptedException ie) {
                System.err.println("Thread error: " + ie);
            }
        }
    }

    public static void main(String args[]) {
        ShowSeconds time = new ShowSeconds();
    }
}