Setting text background color?

Question

How can I set text background color in JOptionPane?

Image:

UIManager UI = new UIManager();
UI.put("OptionPane.background", Color.white);
UIManager.put("Button.background", Color.white);
UI.put("Panel.background", Color.white);
UI.put("OptionPane.foreground", Color.white);
UI.put("OptionPane.messagebackground", Color.white);
UI.put("OptionPane.textbackground", Color.white);
UI.put("OptionPane.warningDialog.titlePane.shadow", Color.white);
UI.put("OptionPane.warningDialog.border.background", Color.white);
UI.put("OptionPane.warningDialog.titlePane.background", Color.white);
UI.put("OptionPane.warningDialog.titlePane.foreground", Color.white);
UI.put("OptionPane.questionDialog.border.background", Color.white);
UI.put("OptionPane.questionDialog.titlePane.background", Color.white);
UI.put("OptionPane.questionDialog.titlePane.foreground", Color.white);
UI.put("OptionPane.questionDialog.titlePane.shadow", Color.white);
UI.put("OptionPane.messageForeground", Color.white);
UI.put("OptionPane.foreground", Color.white);
UI.put("OptionPane.errorDialog.border.background", Color.white);
UI.put("OptionPane.errorDialog.titlePane.background", Color.white);
UI.put("OptionPane.errorDialog.titlePane.foreground", Color.white);
UI.put("OptionPane.errorDialog.titlePane.shadow", Color.white);

JOptionPane.showMessageDialog(null, "Hello world", "HELLO WORLD", JOptionPane.INFORMATION_MESSAGE);

Answer 1

Why not you simply add a custom JPanel at this place as shown below :

JOptionPane.showMessageDialog(frame, getLabelPanel(), "Hello World!",
                                        JOptionPane.INFORMATION_MESSAGE);

You can get the JPanel from a method, like :

private JPanel getLabelPanel() {
    JPanel panel = new JPanel();
    panel.setOpaque(true);
    panel.setBackground(Color.BLUE);
    JLabel helloLabel = new JLabel("Hello World!", JLabel.CENTER);
    helloLabel.setForeground(Color.WHITE);
    panel.add(helloLabel);

    return panel;
}

OUTPUT :

---

UPDATE 1 :

Else you can try this to change everything,

uimanager.put("OptionPane.background", Color.BLUE);
uimanager.put("OptionPane.messagebackground", Color.BLUE);
uimanager.put("Panel.background", Color.BLUE);

UPDATED OUTPUT :

Answer 2

try

UIManager UI=new UIManager();
 UI.put("OptionPane.background",new ColorUIResource(255,255,0));
 UI.put("Panel.background",new ColorUIResource(255,255,0));