Java that adds time

Question

I got Codes below, it generates my current time.

public static void main(String[] args) {
        long timeInMillis = System.currentTimeMillis();
        Calendar cal1 = Calendar.getInstance();
        cal1.setTimeInMillis(timeInMillis);
        SimpleDateFormat dateFormat = new SimpleDateFormat("hh:mm:ss a");
        String dateforrow = dateFormat.format(cal1.getTime());
        System.out.println(dateforrow );
}

Now How can I add hours to the current time? Like for example my current time 4:30:00 PM , and I want to add 8 hours to it, so maybe the output is 0:30:00 AM. I have no Idea.

Java 8 way : LocalTime dateTime = LocalTime.now(); // will give you current system time System.out.println(dateTime.plusHours(2)); //add 2 hours to the time — Mehraj Malik, Mar 08 '17 at 08:52
@Mehraj Malik That works but it returns a 24 hours format. (e.g 19:00:00) — Regie Baguio, Mar 08 '17 at 09:09

score 2 · Accepted Answer · edited Mar 08 '17 at 10:18

You can try something like,

public static void main(String[] args) {
    long timeInMillis = System.currentTimeMillis();
    Calendar cal1 = Calendar.getInstance();
    cal1.setTimeInMillis(timeInMillis);
    cal1.add(Calendar.HOUR, 8);
    SimpleDateFormat dateFormat = new SimpleDateFormat("hh:mm:ss a");
    String dateforrow = dateFormat.format(cal1.getTime());
    System.out.println(dateforrow );
}

score 1 · Answer 2 · answered Mar 08 '17 at 08:47

        long timeInMillis = System.currentTimeMillis();
        Calendar cal1 = Calendar.getInstance();
        cal1.setTimeInMillis(timeInMillis);
        Date date = cal1.getTime();
        //add two hour
        date.setHours(date.getHours()+2);
       cal1.setTime(date);
        SimpleDateFormat dateFormat = new SimpleDateFormat("hh:mm:ss a");

        String dateforrow = dateFormat.format(cal1.getTime());
        System.out.println(dateforrow );

add two hour

Java that adds time

2 Answers2