Question

so im making a simple box from java and this is the code so far:

import java.awt.Canvas;
import javax.swing.JFrame;

public class Display {

    public static final int WIDTH = 800;
    public static final int LENGTH = 600;

    public static void main(String[] args) {
        Display game = new Display();
        JFrame frame = new JFrame();
        frame.setResizable(false);
        frame.setVisible(true);
        frame.setSize(WIDTH, LENGTH);
        frame.add(game);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

im getting an error here “frame.add(game);” its says “The method add(Component) in the type Container is not applicable for the arguments (Display)”

How im not sure what im doing wrong, im using javaSE-1.6

Answer 1

You’re trying to add an instance of Display, which isn’t a Swing component, to your frame, hence the error. Looking at your imports, you probably meant to add a JPanel within your Display class (if there is one) to the frame.

Alternatively, your Display class needs to inherit from something like JComponent, if you want to add it directly. You shouldn’t mix AWT and Swing components needlessly.