您将如何使用与参数的类名相同的名称添加时间偏移

Question

我需要填写时间偏移的方法但是使用类名作为参数名我不知道怎么做 我尝试将变量添加在一起，但出现错误提示“您无法将 Time 转换为 int”

所以我不知道该怎么做， 请尽快回复 谢谢！

错误类型：

Time.java:48: error: bad operand types for binary operator '+'
       this.minutes += offset;
                    ^
  first type:  int
  second type: Time
1 error

public class Time
{
   // The values of the three parts of the time
   private int hours;
   private int minutes;
   private int seconds;

   public Time()
   {
      this.hours = 0;
      this.minutes = 0;
      this.seconds = 0;
   }

   public Time(int h, int m, int s)
   {
      this.hours = h;
      this.minutes = m;
      this.seconds = s;
   }
   
   public void add(Time offset)
   {
        // Part b: complete the add method
   }

   public String toString()
   {
      return pad(hours) + ":" + pad(minutes) + ":" + pad(seconds);
   }

   private String pad(int value)
   {
      String sign = "";
      if (value < 0)
      {
         sign = "-";
         value = -1 * value;
       }
       if (value < 10) {
          return sign + "0" + value;
       } else {
          return sign + value;
       }
    }

    public static void main(String[] args)
    {
       Time time1 = new Time(1,1,1);
       Time time2 = new Time(2,2,2);
       time1.add(time2);
       System.out.println("The result of (1,1,1).add(2,2,2) is " +
                           time1 + " and should be (03:03:03)");

       time1 = new Time(0,0,59);
       time2 = new Time(0,0,1);
       time1.add(time2);
       System.out.println("The result of (0,0,59).add(0,0,1) is " +
                           time1 + " and should be (00:01:00)");

       time1 = new Time(0,59,0);
       time2 = new Time(0,0,1);
       time1.add(time2);
       System.out.println("The result of (0,59,0).add(0,0,1) is " +
                           time1 + " and should be (00:59:01)");

       time1 = new Time(0,59,59);
       time2 = new Time(0,0,1);
       time1.add(time2);
       System.out.println("The result of (0,59,59).add(0,0,1) is " +
                           time1 + " and should be (01:00:00)");

       time1 = new Time(23,0,0);
       time2 = new Time(1,0,0);
       time1.add(time2);
       System.out.println("The result of (23,0,0).add(1,0,0) is " +
                           time1 + " and should be (00:00:00)");

       time1 = new Time(23,59,59);
       time2 = new Time(23,59,59);
       time1.add(time2);
       System.out.println("The result of (23,59,59).add(23,59,59) is " +
                           time1 + " and should be (23:59:58)");
   }
}

Answer 1

你要把相应的时间部分加起来：

public void add(Time offset)
{
    this.seconds = this.seconds + offset.seconds;
    if(this.seconds >= 60) {
        this.seconds -= 60;
        this.minutes += 1;
    }
    this.minutes += offset.minutes;
    if(this.minutes >= 60) {
        this.minutes -= 60;
        this.hours += 1;
    }
    this.hours += offset.hours;
    if(this.hours >= 24)
        this.hours -= 24;
}