Setting background color for a JFrame

Retrieve the content pane for the frame and use the setBackground() method inherited from Component to change the color.

Example:

myJFrame.getContentPane().setBackground( desiredColor );

To set the background color for JFrame:

getContentPane().setBackground(Color.YELLOW);  //Whatever color

You can use a container like so:

Container c = JFrame.getContentPane();
c.setBackground(Color.red); 

You must of course import java.awt.Color for the red color constant.

I had trouble with changing the JFrame background as well and the above responses did not solve it entirely. I am using Eclipse. Adding a layout fixed the issue.

public class SampleProgram extends JFrame {
    public SampleProgram() {
        setSize(400,400);
        setTitle("Sample");
        getContentPane().setLayout(new FlowLayout());//specify a layout manager
        getContentPane().setBackground(Color.red);
        setVisible(true);
}

You can use this code block for JFrame background color.

    JFrame frame = new JFrame("Frame BG color");
    frame.setLayout(null);
    
    frame.setSize(1000, 650);
    frame.getContentPane().setBackground(new Color(5, 65, 90));
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setResizable(false);
    frame.setVisible(true);