请问下在此java程序上，想要添加实现一个方法add()，增加一秒后，并显示时间。该怎么实现？？

Question

在此java程序上，添加实现一个方法add()，增加一秒后，并显示时间。class Clock{
int hour,min,sec;
Clock(int h,int m,int s){
hour=h;
min=m;
sec=s;
}
Clock(){}
void show()
{
System.out.printf("时间 %d:%d:%d",hour,min,sec);
System.out.println();
}
}
public class TextClass{
public static void main(String args[]){
Clock c1=new Clock(4,20,9);
Clock c2=new Clock(2,3,4);
Clock c3=new Clock(14,2,9);
c1.show();
c2.show();
c3.show();
}
}

Answer 1

class Clock{int hour,min,sec;Clock(int h,int m,int s){hour=h;min=m;sec=s;}Clock(){}void add(){sec++;}void show(){System.out.printf("时间 %d:%d:%d",hour,min,sec);System.out.println();}}public class TextClass{public static void main(String args[]){Clock c1=new Clock(4,20,9);Clock c2=new Clock(2,3,4);Clock c3=new Clock(14,2,9);c1.show();c2.show();c3.show();c3.add();c3.show();}}