DisplaySizeCalculator.java

import java.awt.Dimension;

public class DisplaySizeCalculator {
    private int screenWidth;
    private int screenHeight;

    //Constructor
    public DisplaySizeCalculator() {
        getScreenDimensions();
    }

    //Gets screen width & height
    private void getScreenDimensions() {
        Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        screenWidth  = (int) screenSize.getWidth();
        screenHeight = (int) screenSize.getHeight();
    }

    //Width accessor
    public int getScreenWidth() {
        return screenWidth;
    }

    //Height accessor
    public int getScreenHeight() {
        return screenHeight;
    }

}