android TimeCalculater

gistfile1.txt

public class ApplicationTest extends ApplicationTestCase<Application> {
    public ApplicationTest() {
        super(Application.class);
    }

    public void testDate(){
        System.out.println("Current : " + currentDate());
        System.out.println("Diff : " + calculateDiffDate(1489382310900L));
        System.out.println("CountTime : " + parseCountTime(40));
        System.out.println("CountTime : " + parseCountTime(60 * 1  + 2));
        System.out.println("CountTime : " + parseCountTime(60 * 60 * 1));
        System.out.println("CountTime : " + parseCountTime(60 * 60 * 1 + 60 * 20 + 30));
    }

    public String calculateDiffDate(long lastDate) {
        Date diffTime = new Date(new Date().getTime() - lastDate);
        SimpleDateFormat diffFormat = new SimpleDateFormat("HH:mm:ss");
        diffFormat.setTimeZone(TimeZone.getTimeZone ("UTC"));
        return diffFormat.format(diffTime);
    }

    public String currentDate(){
        Date time = new Date();
        SimpleDateFormat diffFormat = new SimpleDateFormat("HH:mm:ss");
        return diffFormat.format(time);
    }

    public String parseCountTime(int countTime){
        String timeString = "";
        int tempTime = countTime;
        int time = 0;

        if((tempTime / (60 * 60)) > 0){
            time = tempTime / (60 * 60);
            timeString += String.format("%02d", time) + ":";
            tempTime = tempTime % (60 * 60);
        }

        if((tempTime / 60) > 0){
            time = tempTime / 60;
            timeString += String.format("%02d", time) + ":";
            tempTime = tempTime % 60;
        }
        else{
            timeString += "00:";
        }

        timeString += String.format("%02d", tempTime);

        return timeString;
    }
}