package com.lovo;import java.util.Calendar;/** * 时钟类 * */public class Clock {    private int hour;            // 时    private int minute;            // 分    private int second;            // 秒        /**     * 构造器     */    public Clock() {        Calendar cal = Calendar.getInstance();        hour = cal.get(11);        minute = cal.get(12);        second = cal.get(13);    }        /**     * 走字     */    public void go() {        second++;        if(second == 60) {            second = 0;            minute++;            if(minute == 60) {                minute = 0;                hour++;                if(hour == 24) {                    hour = 0;                }            }        }    }        /**     * 显示时间     * @return 当前时间的字符串     */    public String showTime() {        String time = "";        if(hour < 10) {            time += "0";        }        time += hour + ":";        if(minute < 10) {            time += "0";        }        time += minute + ":";        if(second < 10) {            time += "0";        }        time += second;        return time;    }}