oow sorry danpost i didn´t say you last post I wil check it out en lookt of it works
martijn13039 wrote ...
2012/5/2
How can you let an actor counting down
@erdelf , 'getWorld()' will still produce an error; as you cannot get the World from an object that is NOT in the world (yet; as that code is in the constructor).
Also, as far as where the code came from. Yes, I was involved in the discussion I had mentioned, but the code was not supplied by me (Duta supplied it).
@danpost, sry I only corrected the line that insults the error. Change line 11 and 12
You know, I do not even know why a Counter object is even created for this scenario. The system timer IS the counter and is ALWAYS present.
@PStigerID (and @erdelf) , You CANNOT use 'getWorld()' AT ALL in the constructor of an actor (not in reference to the actor that is being created). The object being created is NOT in the world and 'getWorld()' will produce NULL. A NullPointerException WILL ensue.
danpost I have try your option but there is a problem there stay on elapsedTime = System.currentTimeMillis() - initialTime; on initialTime an red squar with possible loss of precision required: int; found; long have you an idee
import greenfoot.*;
import java.awt.Color;
public class Timer extends Actor
{
long initialTime = System.currentTimeMillis();
int elapsedTime = 0;
public Timer()
{
updateImage();
}
public void act()
{
elapsedTime = System.currentTimeMillis() - initialTime;
updateImage();
if (elapsedTime >= 60000) ((BackGround) getWorld()).gameOver();
}
private void updateImage()
{
setImage(new GreenfootImage("" + ((int) ((60000 -
elapsedTime)) / 1000), 24, Colour.BLACK, new Color(0, 0, 0, 0)));
}
}
@PSigerID, he already has an object created, in the Tijd class (which is his timer class), but did not have it being added to the world, nor had an image for it. The code I gave on page 1 for the timer class gives it an image to display. All he need do now is addObject(new Tijd(), x, y) in the world.
now I got this but er is some error with '';'' this sign
long initialTime = System.currentTimeMillis();
long instead of int = 0;
Danpost I'm sorry for that stupid question I really shame me but wil thank you and the other guys a lot it is working now
I hope you wil forgive me :p
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