将军事时间更改为标准时间的程序

Question

public class Time 
    { 
     private int time = 1200; 
     private int hour = 00; 
     private int minute = 00; 

     public Time() 
     { 
     time = 1200; 

     } 

     public Time (int h, int m) 
     { 
     hour = h; 
     minute= m; 

     } 

     public String toString() 
     { 
     hour =time % 1000; 

     return hour; 
     } 
    } 

我想知道如何使用模数将两位数设置为小时变量。

Answer 1

如果你想使用一些Java的像Date和SimpleDateFormat内置的功能，你可以做这样的事情：

import java.util.Scanner; 
import java.text.SimpleDateFormat; 
import java.util.Date; 

class Main { 
    public static void main(String[] args) { 
    System.out.println("James Mathis's 24-hour (Miltary) to 12-hour time converter"); 
    System.out.println("=========================================================="); 
    System.out.print("Please enter a 24 time in the format hh:mm (example: 13:45):"); 

    Scanner scanIn = new Scanner(System.in); 
    String input24Time = scanIn.nextLine(); 
    scanIn.close(); 
    System.out.println("24-hour (Military) Time entered: " + input24Time); 

    try { 
     final SimpleDateFormat sdf = new SimpleDateFormat("H:mm"); 
     final Date dateObj = sdf.parse(input24Time); 
     String timein12Format = new SimpleDateFormat("K:mm a").format(dateObj); 
     System.out.println("The equivalent 12 hour time is: " + timein12Format); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
    } 
} 

试试吧here!