从输入的秒开始计算小时和分钟

Question

package HW5820;

import java.util.Scanner;


public class HoursAndMinutes {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //write a program to display hour and minute from total seconds

        Scanner input = new Scanner(System.in);

        int seconds=0;

        System.out.println("Enter number of seconds");
        seconds = input.nextInt();

        int min;
        min = seconds/60;

        int hours;
        hours= min/60;


        System.out.println("Your entered time is "+min+" Minutes or, "+hours+" hour");

Answer 1

从最高级别（小时）开始，然后向下工作，将秒替换为前一个操作剩下的秒：

int seconds = input.nextInt();

int hours = (int)(seconds / 3600); // Seconds in an hour
seconds = seconds % 3600; // Seconds left over

int minutes = (int)(seconds / 60); // Seconds in a minute
seconds = seconds % 60; // Seconds left over

System.out.println("Your entered time is " + 
                   hours + " hours, " + 
                   minutes + " minutes, and " + 
                   seconds + " seconds.");

作为进一步的改进，您可以通过将幻数分配给命名良好的变量来消除幻数，即：

int SECONDS_IN_HOUR = 3600;
int SECONDS_IN_MINUTE = 60;

然后在您的操作中使用：

int hours = (int)(seconds / SECONDS_IN_HOUR);
seconds = seconds % SECONDS_IN_HOUR; // Seconds left over

int minutes = (int)(seconds / SECONDS_IN_MINUTE);
seconds = seconds % SECONDS_IN_MINUTE; // Seconds left over