Author Topic: Setting the background of a JFrame (Read 10301 times)

ben_g · « **on:** July 16, 2011, 10:52:48 am »

I'm trying to set the background color of an undecorated JFrame to black, but the SetBackground methot does nothing.

My Window creation code:

Code: [Select]

JFrame.setDefaultLookAndFeelDecorated(true);
    Loading = new JFrame("");
    Loading.setAlwaysOnTop(true);
    Loading.setLayout(null);
    Loading.setUndecorated(true);
    Loading.getRootPane().setWindowDecorationStyle(JRootPane.NONE);
    JLabel LoadingText = new JLabel("Loading... - Please wait.");
    LoadingText.setBounds(250,0,500,15);
    LoadingText.setHorizontalAlignment((int)JFrame.CENTER_ALIGNMENT);
    LoadingText.setForeground(Color.WHITE);
    LoadingBar.setMinimum(0);
    LoadingBar.setMaximum(100);
    LoadingBar.setValue(0);
    LoadingBar.setForeground(Color.GREEN);
    LoadingBar.setBackground(Color.RED);
    LoadingBar.setBounds(0,30,1000,30);
    Loading.getContentPane().add(LoadingText);
    Loading.getContentPane().add(LoadingBar);
    Loading.setBounds(Toolkit.getDefaultToolkit().getScreenSize().width/2-500,Toolkit.getDefaultToolkit().getScreenSize().height/2-100,1000,200);
    Loading.setBackground(Color.BLACK);
    Loading.setFocusable(true);
    Loading.setVisible(true);

And this is the result:

You can see that the SetBackground method hasn't done anything. Is there a way to make the background of a JFrame black?

Munchor · « **Reply #1 on:** July 16, 2011, 11:19:20 am »

Code: [Select]

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

class jframtest {
        public static void main (String[] args) {
                JFrame myFrame = new JFrame();
                myFrame.setDefaultLookAndFeelDecorated(true);
                myFrame.setBackground(Color.BLACK);
                myFrame.setSize(400,400);
                myFrame.setVisible(true);
        }
}

I tried that and it didn't work either, so I investigated on it and found out:

The method "JFrame.setBackground()" has been deprecated on Swing.

In other words, everything about the JFrame relating to it being a container has been rendered void of use. Instead, you have to call javax.swing.JFrame.getContentPane() and use that container.

I tried this and it worked:

Code: [Select]

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

class javaframetest {
        public static void main (String[] args) {
                JFrame myFrame = new JFrame();
                myFrame.setDefaultLookAndFeelDecorated(true);
                myFrame.getContentPane().setBackground(Color.BLACK);
                myFrame.setSize(400,400);
                myFrame.setVisible(true);
        }
}

ben_g · « **Reply #2 on:** July 16, 2011, 12:39:34 pm »

Thanks. It works now.

Munchor · « **Reply #3 on:** July 24, 2011, 09:52:41 am »

Quote from: ben_g on July 16, 2011, 12:39:34 pm

Thanks. It works now.

In fact, I even made a post on it on my blog, here.

I'm glad to help

Author Topic: Setting the background of a JFrame (Read 10301 times)

ben_g

Setting the background of a JFrame

Munchor

Re: Setting the background of a JFrame

ben_g

Re: Setting the background of a JFrame

Munchor

Re: Setting the background of a JFrame