java - Java中如何实现时间的加法？

Question

我想知道为什么我不能得到正确的时间相加结果，例如:从 2:50:20 + 0:20:40 得到 3:11:0，但是我只得到了类似 3:10 的结果: 0。所以，下面是我的工作；

    //variable
    int hour, min, sec;
    int hour1, min1, sec1;
    int total, total1, total2;
    int total11,total12, total21, total22;

    //input1
    Scanner input = new Scanner(System.in);
    System.out.print("Input hours\t: ");
    hour = input.nextInt();
    System.out.print("Input minutes\t: ");
    min = input.nextInt();
    System.out.print("Input seconds\t: ");
    sec = input.nextInt();

    //output1
    System.out.println("Time 1 is " + hour + ":" + min + ":" + sec);

    //input2
    System.out.print("Input additional hours\t: ");
    hour1 = input.nextInt();
    System.out.print("Input additional minute\t: ");
    min1 = input.nextInt();
    System.out.print("Input additional seconds\t: ");
    sec1 = input.nextInt();

    //output2
    System.out.println("Time 2 is " + jam1 + ":" + menit1 + ":" + detik1);

    //process
    total = hour + hour1;
    total1 = min + min1;
    total11 = total1/60;
    total12 = total11%60;
    total2 = sec + sec1;
    total21 = total2/60;
    total22 = total2%60;

    if (total1 > 60) {
    total1 = (min + min1) - 60;
        total = (hour + hour1) + total11;
        total2 = (sec + sec1)-60;
    }
    if (total2 > 60) {
        total2 = (sec + sec1) - 60;
        total1 = (min + min1) + total22;
    }
    //finaloutput
    System.out.println("Your total time is  " + total + ":" + total1 + ":" + total2);

*抱歉语法问题:)我真的很感谢你的回答:)

Answer 1

我发现执行这些操作的最佳方法是将两个时间都转换为秒(因此将 3:11:00 转换为午夜过后的 11460 秒)，添加/减去它们，然后转换回 hh:mm: SS。大致:

int time1 = (hours1 * 60 + min1) * 60 + sec1;
int time2 = (hours2 * 60 + min2) * 60 + sec2;
int total = time1 + time2;
short hour = total / 3600;
short minute = total / 60 % 60;
short second = total %60;