//创建自己的包 package com.deitel.jhtp5.ch08; //国际internet域名的到序 import java.text.DecimalFormat;

public class Bag extends object{ private int hour; private int minute; private int second; public Bag() { setTime(0,0,0); } public void setTime(int h,int m,int s) { hour = (( h>=0 && h<24) ? h : 0); minute = (( m>=0 && m<60 ) ? m : 0); second = (( s>=0 && s<60 ) ? s : 0); } public String toUniversalString() { DecimalFormat twoDigits = new DecimalFormat("00"); return twoDigits.format(hour) + ":" + twoDigits.format(minute) + ":" + twoDigits.format( second); } public String toStandardString() { DecimalFormat twoDigits = new DecimalFormat("00"); return ((hour == 12) || hour == 0) ? 12 : hour % 12) + ":" + //不能通过编译 twoDigits.format(minute) + ":" + twoDigits.format(second) + (hour <12 ? "AM" : "PM"); } }