Hi, I'm trying to create a timer

[groovygarden]

Hi,

I'm trying to create a timer that will count up from 0 to measure and display the length of time a user has been active - updating in seconds. This is an extract from my code:

public void actionPerformed(ActionEvent event)
  {

Date today  = new Date();;
String result;
SimpleDateFormat formatter = new SimpleDateFormat("mm:ss");

today.setMinutes(00);
today.setSeconds(00);

result = formatter.format(today);

System.out.println("Result: " + result);

If I set minutes and seconds to 00, all that happens is that the system prints out 00:00 at one second intervals. If I don't set them, it prints the correct current time updating at one second intervals.

What am I doing wrong?

Thanks

 

[laffreuxthomas]

Hi

The instruction new getDate() creates a Date instance that contains the current date.

You have to save the starting date when your program start. For example, in the constructor:
this.startDate = new Date();

Then , in your event, something like this:
Date today = new Date();
today.setTime(today.getTime() - startDate.getTime());
// ...

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