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From: Jeff Higgins <jeff@invalid.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: How can I use Operand (+ , - )  with Time
Date: Sun, 15 Jan 2012 08:32:52 -0500
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On 01/15/2012 02:44 AM, sahm wrote:
> Hi every One
>
> I'm Try to do program to calculate the Over Time, I'm working with 24
> hour not A.M.&  P.M. and this is my Time format (HH:MM:SS) (00:00:00).
> But how can I use operand (+, -) with Time

See Stefan for the answer.
An alternative follows.

> This is my Code
>
> /////////////////////////////////////////////////////////////////////
> import java.sql.Time;
> import java.util.Date;
>
>
> public class OverTimeDetailsDataClass {
>
>      String Emp_ID;
>      String OverTime_Doc_NO;
>      String OverTime_Date;
>      Time OverTime_Start_Time;
>      Time OverTime_End_Time;
>      Time OverTimeTotalHours;
>
>      OverTime_Start_Time =
> Time.valueOf(OverTimeFromjTextField.getText());
>      OverTime_End_Time = Time.valueOf(OverTimeTOjTextField.getText());
>      OverTimeTotalHours = OverTime_End_Time - OverTime_Start_Time;
> }

import java.sql.Time;
import java.util.Calendar;
import java.util.Locale;
import java.util.TimeZone;

import javax.swing.JTextField;


public class OT {

   public static void main(String[] args) {

     JTextField OverTimeFromjTextField = null;
     JTextField OverTimeTOjTextField = null;

     Time OverTime_Start_Time;
     Time OverTime_End_Time;

     // Be aware: read the documentation for java.util.Calendar
     TimeZone timeZone = TimeZone.getDefault();
     Locale locale = Locale.getDefault();

     Calendar startTime = Calendar.getInstance(timeZone,locale);
     Calendar endTime = Calendar.getInstance(timeZone,locale);

     OverTime_Start_Time =
         Time.valueOf(OverTimeFromjTextField.getText());
     OverTime_End_Time = Time.valueOf(OverTimeTOjTextField.getText());

     startTime.setTime(OverTime_Start_Time);
     endTime.setTime(OverTime_End_Time);

     // use the java.util.Calendar.add(int field, int amount) method
     // as described in the documentation.

   }

}