How to use

setBackground

method

in

java.awt.Component

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

class FixedSizeContent {
  public static void main(String[] args) {
    SwingUtilities.invokeLater( new Runnable() {
      public void run() {
        JFrame f = new JFrame("Fixed size content");
        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        Container c = f.getContentPane();
        c.setBackground(Color.YELLOW);
        // adjust to need.
        Dimension d = new Dimension(400,40);
        c.setPreferredSize(d);
        f.pack();
        f.setResizable(false);
        f.setVisible(true);
      }
    });
  }
}

if (useSlideButton) {
  final JPanel statusPanel = new JPanel();
  basePanel.add(statusPanel, BorderLayout.SOUTH);
  statusPanel.add(new JButton("Slide Left") {
    private static final long serialVersionUID = 9204819004142223529L;
  statusPanel.add(new JButton("Slide Right") {
if (w instanceof JFrame) {
  final JFrame j = (JFrame) w;
  if (j.getContentPane().getComponents().length > 0) {
    throw new RuntimeException("ProgramCheck: Parent already contains content.");
  j.getContentPane().add(basePanel);
  ((JFrame) parent).getContentPane().setBackground(jPanels.get(0).getBackground());
  parent.remove(basePanel);
  parent.validate();
  ((JDialog) parent).getContentPane().setBackground(jPanels.get(0).getBackground());
  parent.remove(basePanel);
  parent.validate();
  ((JWindow) parent).getContentPane().setBackground(jPanels.get(0).getBackground());
  parent.remove(basePanel);
  parent.validate();

import java.applet.*;
import java.awt.*;
public class JavaVersionDisplayApplet extends Applet
{ private Label m_labVersionVendor; 
 public JavaVersionDisplayApplet() //constructor
 { Color colFrameBackground = Color.pink;
  this.setBackground(colFrameBackground);
  m_labVersionVendor = new Label (" Java Version: " +
                 System.getProperty("java.version")+
             " from "+System.getProperty("java.vendor"));
  this.add(m_labVersionVendor);
 }
}

cd.setBackground(Color.BLUE);
add(cd);
g.setVisible(true);

 import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;

import javax.swing.JFrame;

public class Frames extends JFrame {
  private static final long serialVersionUID = 1L;

  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      public void run() {
        try {
          new Frames();
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    });
  }

  public Frames() {
    setSize(new Dimension(100, 100));
    setTitle("MAIN MENU");
    getContentPane().setBackground(Color.YELLOW);
    setVisible(true);
  }

}

final JFrame frame = new JFrame("Image Manipulation Demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setBackground(Color.BLUE.darker());
frame.getContentPane().setLayout(new FlowLayout());
frame.getContentPane().add(new JLabel(new ImageIcon(ORIGINAL)));
frame.getContentPane().add(new JLabel(new ImageIcon(ALTERED)));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);

panel.setBackground(Color.cyan.darker());
add(panel);
pack(); 
setVisible(true);

 import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Label;

/**
 *
 * @author hmmmmm
 */
public class MessageApplet extends Applet {

  private Label m_mess;

  public void init() {
    setBackground(Color.lightGray);
    setLayout(new BorderLayout());
    m_mess = new Label("MessageApplet is Running... : No Selection Yet", Label.CENTER);
    add(BorderLayout.CENTER, m_mess);
    m_mess.setBackground(Color.red);
  }

  public void setMessage(String message) {
    m_mess.setText("Selection : " + message);
  }
}

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

public class BFrame {

  public static void main(String[] args) {
    new JFrame() {{
      super.setBackground(Color.CYAN);
      this.getRootPane().setBackground(Color.BLUE);
      this.getLayeredPane().setBackground(Color.RED);
      this.getContentPane().setBackground(Color.YELLOW);
      this.setSize(400,340); 
      this.setVisible(true);
    }};
  }
}

JFrame f = new JFrame();
f.setLayout(new FlowLayout());
f.getContentPane().setBackground(new Color(0xffffc0));
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel.add(new TransparentTextArea(0));
jif.add(panel);
jif.setVisible(true);
f.add(jif);
f.pack();
f.setVisible(true);

window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setLocationByPlatform(true);
window.setVisible(true);
setSize(iWidth, iHeight);
getContentPane().setBackground(pInterfaceColour);
pGradientPane = new JPanel() {
  private static final long serialVersionUID = 1L;
pGradientPane.setPreferredSize(new Dimension(iWidth - 16, iHeight - 62));
add(pGradientPane);

private JFrame f = new JFrame("Colors");
private static final String ITEMS[] = {" black ", " blue ", " green ",
  " orange ", " purple ", " red ", " white ", " yellow "};
    checkBoxes[i].addItemListener(this);
    enabledFlags[i] = true;
    pnlEnablers.add(checkBoxes[i]);
  scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
      f.setVisible(true);
      if (isSelected & cellHasFocus) {
        comp.setForeground(Color.black);
        comp.setBackground(Color.red);
      } else {
        comp.setForeground(Color.blue);
        if ((value.toString()).trim().equals("yellow")) {
          comp.setForeground(Color.orange);
          comp.setBackground(Color.magenta);

JFrame frame = new JFrame();
frame.setTitle("Test Background");
frame.setLocation(200, 100);
frame.getContentPane().setBackground(Color.BLUE);
frame.setVisible(true);

JFrame frame = new JFrame();
frame.getContentPane().setBackground(Color.yellow);
frame.getContentPane().add(button);
frame.getContentPane().setLayout(new FlowLayout());
frame.setSize(150, 150);
frame.setVisible(true);

private JFrame frame = new JFrame("Frame");
private JPanel fatherCenter = new JPanel();
private JScrollPane tableScroll = new JScrollPane();
        comp.setForeground(Color.black);
        if ((type) && (!type1)) {
          comp.setBackground(Color.yellow);
        } else if ((!type) && (type1)) {
          comp.setBackground(Color.orange);
        } else if ((!type) || (!type1)) {
          comp.setBackground(Color.red);
          comp.setBackground(row % 2 == 0 ? getBackground() : getBackground().darker());
        comp.setBackground(Color.lightGray);
        comp.setBackground(Color.magenta);
  fatherCenter.add(tableScroll, BorderLayout.CENTER);
  pane.add(fatherCenter);

JFrame f = new JFrame( frameTitle );
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(400, 150);
Container content = f.getContentPane();
content.setBackground(Color.white);
content.setLayout(new FlowLayout()); 
content.add(new JLabel("Initializing ... "));
f.setVisible(true);
f.setVisible(true);

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

public class test {
  static JFrame frame;
  static Canvas canvas;

  public static void main(String[] args){
    frame  = new JFrame();
    canvas = new Canvas();

    canvas.setBackground(Color.cyan);
    frame.getContentPane().add(canvas);
    frame.setVisible(true);
  }
}

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

public class TestUnderscore 
{
 // Test routine.
 public static void main(String[] args) 
 {
  JFrame frame = new JFrame();
  frame.getContentPane().setBackground(Color.yellow);
  frame.getContentPane().add(new JLabel("Test_Underscore$$"));
  frame.getContentPane().setLayout(new FlowLayout());
  frame.setSize(450, 450);
  frame.setVisible(true);
 }
}

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

public class CustomComponent extends JFrame {

private static final long serialVersionUID = 1L;

public CustomComponent() {

}

public static void main(String[] args) {
  JFrame frame = new JFrame("Java Rulez");
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.setBounds(100,100,600,600);
  frame.getContentPane().setBackground(Color.YELLOW);

  frame.add(new RectangleComponent(0, 0, 500, 500));

  frame.setLocationRelativeTo(null);
  frame.setVisible(true);
}
}

 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 );
   }
  } );
 }
}