Java JFrame background color not working

Question

I tried using:

frame1.getContentPane().setBackground(Color.yellow);

But it is not working. Can anyone help me?

import java.         


        

Answer 1

Since you did not post an SSCCE, I will do it for you. This shows how to change the background color of a JFrame. Starting from this, you can start adding components to the JFrame and see where you go wrong, instead of letting us look at a few hundred lines of code.

import javax.swing.JFrame;
import java.awt.Color;
import java.awt.EventQueue;

public class ColoredFrame {

  public static void main( String[] args ) {
    EventQueue.invokeLater( new Runnable() {
      @Override
      public void run() {
        JFrame frame = new JFrame( "TestFrame" );
        frame.getContentPane().setBackground( Color.PINK );
        //frame contains nothing, so set size
        frame.setSize( 200, 200 );
        frame.setVisible( true );
        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
      }
    } );
  }
}

Answer 2

I know this is a very old question, but for others that are looking for the right answer this could also be written as following:

frame1.getContentPane().setBackground(new Color (255,255,102)); //or whatever color you want in the RGB range

Answer 3

Just put your setVisible(true); at the end of your constructor.

Moreover you had added mainPnl on your JFrame, so changing colour of the JFrame will be useless,

so instead of writing

add(mainPnl);

in your GameFrame class, you better be using

setContentPane(mainPnl);

for frame1.getContentPane().setBackground(Color.YELLOW); to work.

Hope this might help

Regards

Answer 4

You should give background color to JPanel and then use this JPanel in your JFrame rather than giving direct background to your JFrame.