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等级：管理员 帖子：1940 积分：26616 威望：0 精华：34 注册：2003/12/30 16:34:32 		程序代码——时间类  发帖心情 Post By：2006/2/26 21:34:16 [只看该作者]

1、基本的功能
时间类：
public class Time
{
        private int hour;
        private int minute;
        private int second;
        
        public void setHour(int h)
        {
                hour=h;
        }
        
        public int getHour()
        {
                return hour;
        }
        
        public void setMinute(int m)
        {
                minute=m;
        }
        
        public int getMinute()
        {
                return minute;
        }
        public void setSecond(int s)
        {
                second=s;
        }
        
        public int getSecond()
        {
                return second;
        }
        
        public String toString()
        {
                return String.valueOf(hour)+":"+String.valueOf(minute)+":"+String.valueOf(second);
                //return ""+hour+":"+minute+":"+second;
        }
}

应用程序：
public class exec
{
        public static void main(String args[])
        {
                Time t1=new Time();
                
                t1.setHour(1);
                t1.setMinute(2);
                t1.setSecond(3);
                
                System.out.println(t1);
        }
}

2、加入验证代码
时间类：
public class Time
{
        private int hour;
        private int minute;
        private int second;
        
        public void setHour(int h)
        {
                if(h>=0 && h<=23)
                        hour=h;
                else
                        hour=0;
                //hour=(h>=0 && h<=23)?h:0;
        }
        
        public int getHour()
        {
                return hour;
        }
        
        public void setMinute(int m)
        {
                if(m>=0 && m<=59)
                        minute=m;
                else
                        minute=0;
        }
        
        public int getMinute()
        {
                return minute;
        }
        public void setSecond(int s)
        {
                if(s>=0 && s<=59)
                        second=s;
                else
                        second=0;
        }
        
        public int getSecond()
        {
                return second;
        }
        
        public String toString()
        {
                return String.valueOf(hour)+":"+String.valueOf(minute)+":"+String.valueOf(second);
                //return ""+hour+":"+minute+":"+second;
        }
}

应用程序：
public class exec
{
        public static void main(String args[])
        {
                Time t1=new Time();
                
                t1.setHour(66);
                t1.setMinute(2);
                t1.setSecond(3);
                
                System.out.println(t1);
        }
}

3、加入构造函数
时间类：
public class Time
{
        private int hour;
        private int minute;
        private int second;
        
        public Time()
        {
                hour=0;
                minute=0;
                second=0;
        }
        
        public Time(int h,int m,int s)
        {
                setHour(h);
                setMinute(m);
                setSecond(s);
        }
        
        
        public void setHour(int h)
        {
                if(h>=0 && h<=23)
                        hour=h;
                else
                        hour=0;
                //hour=(h>=0 && h<=23)?h:0;
        }
        
        public int getHour()
        {
                return hour;
        }
        
        public void setMinute(int m)
        {
                if(m>=0 && m<=59)
                        minute=m;
                else
                        minute=0;
        }
        
        public int getMinute()
        {
                return minute;
        }
        public void setSecond(int s)
        {
                if(s>=0 && s<=59)
                        second=s;
                else
                        second=0;
        }
        
        public int getSecond()
        {
                return second;
        }
        
        public String toString()
        {
                return String.valueOf(hour)+":"+String.valueOf(minute)+":"+String.valueOf(second);
                //return ""+hour+":"+minute+":"+second;
        }
}

应用程序：
public class exec
{
        public static void main(String args[])
        {
                Time t1=new Time(66,2,3);
                
                System.out.println(t1);
        }
}

4、加入格式化显示的代码，使之自动补零以显示两位数字
时间类：
public class Time
{
        private int hour;
        private int minute;
        private int second;
        
        public Time()
        {
                hour=0;
                minute=0;
                second=0;
        }
        
        public Time(int h,int m,int s)
        {
                setHour(h);
                setMinute(m);
                setSecond(s);
        }
        
        
        public void setHour(int h)
        {
                if(h>=0 && h<=23)
                        hour=h;
                else
                        hour=0;
                //hour=(h>=0 && h<=23)?h:0;
        }
        
        public int getHour()
        {
                return hour;
        }
        
        public void setMinute(int m)
        {
                if(m>=0 && m<=59)
                        minute=m;
                else
                        minute=0;
        }
        
        public int getMinute()
        {
                return minute;
        }
        public void setSecond(int s)
        {
                if(s>=0 && s<=59)
                        second=s;
                else
                        second=0;
        }
        
        public int getSecond()
        {
                return second;
        }
        
        public String toString()
        {
                String str="";
                String sh=String.valueOf(hour);
                if(sh.length()==1)
                        str=str+"0";
                str=str+sh+":";
                        
                sh=String.valueOf(minute);
                if(sh.length()==1)
                        str=str+"0";
                str=str+sh+":";
                        
                sh=String.valueOf(second);
                if(sh.length()==1)
                        str=str+"0";
                str=str+sh;
                
                return str;
        }
}

应用程序：
public class exec
{
        public static void main(String args[])
        {
                Time t1=new Time(12,2,3);
                
                System.out.println(t1);
        }
}
输出为：
12:02:03

此时更为有效的时间类为（注意toString()方法）：
public class Time
{
        private int hour;
        private int minute;
        private int second;
        
        public Time()
        {
                hour=0;
                minute=0;
                second=0;
        }
        
        public Time(int h,int m,int s)
        {
                setHour(h);
                setMinute(m);
                setSecond(s);
        }
        
        
        public void setHour(int h)
        {
                if(h>=0 && h<=23)
                        hour=h;
                else
                        hour=0;
                //hour=(h>=0 && h<=23)?h:0;
        }
        
        public int getHour()
        {
                return hour;
        }
        
        public void setMinute(int m)
        {
                if(m>=0 && m<=59)
                        minute=m;
                else
                        minute=0;
        }
        
        public int getMinute()
        {
                return minute;
        }
        public void setSecond(int s)
        {
                if(s>=0 && s<=59)
                        second=s;
                else
                        second=0;
        }
        
        public int getSecond()
        {
                return second;
        }
        
        public String toString()
        {
                java.text.DecimalFormat df=new java.text.DecimalFormat("00");
                return df.format(hour)+":"+df.format(minute)+":"+df.format(second);
                
        }
}

5、加入格式化显示的代码，使之显示上下午时间（注意toString()方法）
时间类：
public class Time
{
        private int hour;
        private int minute;
        private int second;
        
        public Time()
        {
                hour=0;
                minute=0;
                second=0;
        }
        
        public Time(int h,int m,int s)
        {
                setHour(h);
                setMinute(m);
                setSecond(s);
        }
        
        
        public void setHour(int h)
        {
                if(h>=0 && h<=23)
                        hour=h;
                else
                        hour=0;
                //hour=(h>=0 && h<=23)?h:0;
        }
        
        public int getHour()
        {
                return hour;
        }
        
        public void setMinute(int m)
        {
                if(m>=0 && m<=59)
                        minute=m;
                else
                        minute=0;
        }
        
        public int getMinute()
        {
                return minute;
        }
        public void setSecond(int s)
        {
                if(s>=0 && s<=59)
                        second=s;
                else
                        second=0;
        }
        
        public int getSecond()
        {
                return second;
        }
        
        public String toString()
        {
                java.text.DecimalFormat df=new java.text.DecimalFormat("00");
                return df.format(hour%12)+":"+df.format(minute)+":"+df.format(second)+(hour<12?"AM":"PM");
                
        }
}

应用程序：
public class exec
{
        public static void main(String args[])
        {
                Time t1=new Time(13,2,3);
                
                System.out.println(t1);
        }
}
输出为：
01:02:03PM

[此贴子已经被作者于2010-12-12 07:38:49编辑过]
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