Time Comparison - Converting To Seconds / Minutes And Hours

I want to compare two times. What I am doing is

java.util.Date date = new java.util.Date();
java.sql.Time cur_time = new java.sql.Time(date.getTime());

/*this is my database connectivity code from where I am getting second date that I am comparing. This is right. Don't bother it.

Connection c= ConnectionManager.getConnection();
String sql = "select t from datesheet where subjectCode=? and sessional=? and d=?";
PreparedStatement ps = c.prepareStatement(sql);
ps.setString(1,subjectCode);
ps.setString(2,sessional);
ps.setDate(3,cur_date);
ResultSet rs = ps.executeQuery();*/
if(rs.next())
{
java.sql.Time t = rs.getTime("t");
long diff = cur_time.getTime()-t.getTime();
}

Then I am converting it to seconds, minutes and hours, but the problem is time that we get from cur_time.getTime() has more digits than time that we get from t.getTime(), so it is always greater than t.getTime() even when it is not.

long seconds = (diff/1000)%60;
long minutes = (diff/60000)%60;
long hours = (diff/(60*60*1000))%24;