JAVA-MANI.BLOGSPOT.COM

import java.awt.Dimension;
import java.awt.Toolkit;

public class ScreenSizeExample {
public static void main(String[] args)
{
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

System.out.println("Screen Widht: " + screenSize.getWidth());
System.out.println("Screen Height: " + screenSize.getHeight());
}
}