1-) Android Yeni -  iki saat arasındaki fark

iki saat arasındaki fark

package com.example.rambo.servisexample;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.concurrent.TimeUnit;

/**
 * Created by Rambo on 4.7.2017.
 */

public class deneme {
    public static void main(String args[]) throws ParseException {
        System.out.println("merhba");


        Calendar c = Calendar.getInstance();

        int saat = c.get(Calendar.HOUR_OF_DAY);//HOUR yaparsan am --> HOUR_OF_DAY yaparsam pm olur
        int dakika = c.get(Calendar.MINUTE);
        int saniye = c.get(Calendar.SECOND);

        int gun = c.get(Calendar.DAY_OF_MONTH);

        int ay = c.get(Calendar.MONTH);
        ay++;
        int yil = c.get(Calendar.YEAR);


        String sistem_saati = yil + "-" + ay + "-" + gun + " " + saat + ":" + dakika + ":" + saniye;

        System.out.println(sistem_saati);

        deneme as = new deneme();



        DateFormat formatter2 = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
        Date date = formatter2.parse(sistem_saati);

        String strFileDate1 = "2017-07-4 18:20:00";
        DateFormat formatter3 = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
        Date date1 = formatter3.parse(strFileDate1);

        String sad = as.getTimeDiff(date, date1);
        System.out.println(sad);
    }

    public String getTimeDiff(Date dateOne, Date dateTwo) {
        String diff = "";
        long timeDiff = Math.abs(dateOne.getTime() - dateTwo.getTime());
        diff = String.format("%d hour(s) %d min(s)", TimeUnit.MILLISECONDS.toHours(timeDiff),
                TimeUnit.MILLISECONDS.toMinutes(timeDiff) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(timeDiff)));
        return diff;
    }
}