Why doesn't this Java Graphics display in OS X?

It seems like you might have forgotten to call the pack() method and set the frame visible in your Java code. Here's a simple Java example that should display a basic graphics window on macOS:

javaCopy code
import javax.swing.*;

import java.awt.*;



public class GraphicsDemo extends JFrame {



    public GraphicsDemo() {

        setTitle("Graphics Demo");

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setSize(400, 300);

        setLocationRelativeTo(null);

    }



    @Override

    public void paint(Graphics g) {

        super.paint(g);

        g.setColor(Color.RED);

        g.fillRect(50, 50, 100, 100);

    }



    public static void main(String[] args) {

        SwingUtilities.invokeLater(() -> {

            GraphicsDemo demo = new GraphicsDemo();

            demo.setVisible(true);

        });

    }

}

In this example, we create a custom JFrame class named GraphicsDemo. The paint method is overridden to draw a red rectangle on the frame. The main method uses SwingUtilities.invokeLater to ensure that the GUI components are created and modified on the Event Dispatch Thread (EDT), which is the recommended practice when working with Swing.

Make sure you have the latest Java version installed on your macOS system, and run the code using the java command in the Terminal or by executing it in an integrated development environment (IDE) like Eclipse or IntelliJ IDEA.

If this code still doesn't display the graphics window, there might be other factors affecting it, such as your Java environment or system settings.