Essaie plutôt ceci:

/*
* ScreenHelper.java
*
* Created on March 19, 2002, 7:54 AM
*/

package ccm;
import java.awt.Toolkit;

/**
*
* @author Hacktrack
* @version 1.0
*/
public class ScreenHelper {

/** Creates new ScreenHelper */
public ScreenHelper() {
}

public static int getHeight(){
return Toolkit.getDefaultToolkit().getScreenSize().height;
}

public static int getWidth(){
return Toolkit.getDefaultToolkit().getScreenSize().width;
}
}






/*
* ScreenTester.java
*
* Created on March 19, 2002, 7:57 AM
*/

package ccm;

/**
*
* @author HackTrack
* @version 1.0
*/
public class ScreenTester {

/** Creates new ScreenTester */
public ScreenTester() {
}

public static void main(String args[]){
ScreenTester tester = new ScreenTester();
System.out.println("La largeur de l'écran est de " + ScreenHelper.getWidth() + " pixels");
System.out.println("La largeur de l'écran est de " + ScreenHelper.getHeight() + " pixels");
}
}


;-)
HackTrack

Merci bien