Use of currentTimeMillis [SOLVED]

[biozik]

Hello everybody,

I am new here. I am French, so excuse me for me English
I am working since one week on Lego Mindstorms NXT with the leJOS API.

I have a problem. I would like to stop my robot after 10 seconds. I have try to use the currentTimeMillis fonction but I have an error when I try to link.

This is my code :

Code: Select all

import lejos.nxt.*;

public class Time
{
public static void main(String [] args) throws Exception
   {
   LCD.clear();
   LCD.drawString("Press ENTER", 3, 3);
   LCD.refresh();
   Button.ENTER.waitForPressAndRelease();
      
   long t1 = System.currentTimeMillis();
   long t2 = t1;
      
while( t2-t1 < 10000 );
   {
   t2 = System.currentTimeMillis();
   LCD.clear();
   LCD.drawString("Wait", 3, 3);
   LCD.refresh();
   }

   LCD.clear();
   LCD.drawString("10 seconds", 3, 3);
   LCD.refresh();
   }
}

I think that the problem is that "t2-t1" is long and the while loop condition works with an integer.
Maybe do you know how I could convert a long in an integer or how to solve this problem?

Thank you

BioZiK

[99jonathan]

if that is indeed the problem, you can convert a long to an int by (int). So you would do something like the following:

Code: Select all

 
...
int t1 = (int) System.currentTimeMillis();
   int t2 = t1;
     
while( t2-t1 < 10000 );
   {
   t2 =(int) System.currentTimeMillis();
...


[biozik]

Thank you very much

It is well running

[99jonathan]

Nice!!