Question

java程序设计 定义一个时钟类，要求如下1,创建新对象时默认0时0分0秒。 2，设置时钟为指定的时间。3，编写

使时钟前进1秒的方法incsecond() 4,以"时：分：秒："的形式输出时钟的时间 5.存储时钟的时HOUR(0~23)、分minute(0~59)、秒second(0~59)

Answer 1

import java.util.Calendar;

public class Clock {

private int hour, mintue, second;

public Clock(){
this(0, 0, 0);
}

public Clock(int hour, int minute, int second){
this.hour = hour;
this.mintue = minute;
this.second = second;
}

public void incsecond(){
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR, hour);
cal.set(Calendar.MINUTE, mintue);
cal.set(Calendar.SECOND, second);

cal.add(Calendar.SECOND, 1);

this.hour = cal.get(Calendar.HOUR);
this.mintue = cal.get(Calendar.MINUTE);
this.second = cal.get(Calendar.SECOND);
}

public String toString(){
return hour + ":" +mintue + ":" + second;
}

public void setHour(int hour) {
this.hour = hour;
}

public void setMintue(int mintue) {
this.mintue = mintue;
}

public void setSecond(int second) {
this.second = second;
}

public static void main(String[] args) {

}

}