Java Program : Convert Time Hour, Minute and Second


In this program converting one time unit value to hour, minute and second. Generally such type of questions asked in interview to check programming logic.

See Also: Java Program : How to convert units?

import java.util.Scanner;

public class TimeConversion {
	static int SECOND = 60*60;
	static int MINUTE = 60;
	static int HOUR = 1;

		public static void main(String[] args) { 

			System.out.println("Please enter :\nh for hour\nm for minute \ns for second");
			Scanner in = new Scanner(System.in);
			System.out.println("Convert from:");
			String fromUnit = in.nextLine();
			System.out.println("Value:");
			int val = in.nextInt();
			String convertedTime = convertTime(fromUnit,val);
			System.out.println("Converted Time :"+convertedTime);
			} 

		private static String convertTime(String unit, int value)
		{
			int h=0,m=0,s=0,seconds=0;
			//Convert to seconds
			switch(unit)
			{
			case "h": seconds=value*SECOND;
			break;
			case "m": seconds=value*MINUTE;
			break;
			case "s": seconds=value;
			break;
			}

			h=seconds/SECOND;
			value=seconds%SECOND;

			m=value/MINUTE;
			value=value%MINUTE;

			s=value/SECOND;

			return h+" Hour "+m+" Minute "+s+" Second";
		}
	}

Output


Please enter :
h for hour
m for minute 
s for second
Convert from:
m
Value:
60
Converted Time :1 Hour 0 Minute 0 Second

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