JFrame background color will not change

Question

I have viewed many answers here and changed my code accordingly but it still does not work correctly. Can someone help me fix it please?

import javax.swing.*;
import java.awt.*;

public class LoginGUI extends JFrame {



    LoginGUI() { 

        Container c = getContentPane();
        c.setBackground(Color.BLACK);
        JPanel p = new JPanel();
        JLabel title = new JLabel("HTML Generator");
        title.setForeground(Color.black);
        p.add(title);
        c.add(p);
        title.setOpaque(true);

        setSize(400, 400);
        setVisible(true);
    }

    public static void main(String[] args) { 
        new LoginGUI();
    }

}

Answer 1

JPanel 's opaque property is true by default, and JFrame default layout is BorderLayout . Adding only one component (the JPanel ) to the frame, will stretch it the full size of the frame, as that's what BorderLayout will do. So, an opaque panel covering the entire frame, that explains the results you are getting.

Three simple fixes. Either set the JPanel opaque property to false, or just set the background on the JPanel , or set the layout of the frame to GridBagLayout or FlowLayout