add one day to current timestamp date in java

1import java.sql.Timestamp;
2import java.util.Calendar;
3import java.util.Date;
4 
5public class AddTime {
6  public static void main( String[] args ) {
7 
8    Timestamp timestamp = new Timestamp(new Date().getTime());
9    System.out.println(timestamp);
10 
11    Calendar cal = Calendar.getInstance();
12    cal.setTimeInMillis(timestamp.getTime());
13 
14    // add 30 seconds
15    cal.add(Calendar.SECOND, 30);
16    timestamp = new Timestamp(cal.getTime().getTime());
17    System.out.println(timestamp);
18 
19    // add 5 hours
20    cal.setTimeInMillis(timestamp.getTime());
21    cal.add(Calendar.HOUR, 5);
22    timestamp = new Timestamp(cal.getTime().getTime());
23    System.out.println(timestamp);
24 
25    // add 30 days
26    cal.setTimeInMillis(timestamp.getTime());
27    cal.add(Calendar.DAY_OF_MONTH, 30);
28    timestamp = new Timestamp(cal.getTime().getTime());
29    System.out.println(timestamp);
30 
31    // add 6 months
32    cal.setTimeInMillis(timestamp.getTime());
33    cal.add(Calendar.MONTH, 6);
34    timestamp = new Timestamp(cal.getTime().getTime());
35    System.out.println(timestamp);
36  }
37}
38 
39