如何更改JPanels的背景颜色与Nimbus看和感觉？ [英] How to change the background color for JPanels with Nimbus Look and Feel?

问题描述

我想在应用程序中为我的所有JPanels使用不同的背景颜色。在使用Nimbus Look and Feel时，我该怎么做？

我按照更改颜色主题以更改Nimbus外观中的组件颜色。

有时，随机。如果我在更改颜色之前设置了 PropertyChagneListener ，则只会通知一次。

这里是一些测试代码：

  public class RedPanels extends JFrame {
 
 public RedPanels {
 JPanel panel = new JPanel（）; 
 add（panel）; 
 setPreferredSize（new Dimension（100，100））; 
 pack（）; 
 setVisible（true）; 
} 
 
 public static void main（String [] args）{
 SwingUtilities.invokeLater（new Runnable（）{
 
 @Override 
 public void run（）{
 
 try {
 for（LookAndFeelInfo info：UIManager.getInstalledLookAndFeels（））{
 if（Nimbus.equals（info.getName ））{
 UIManager.setLookAndFeel（info.getClassName（））; 
 UIManager.getDefaults（）。addPropertyChangeListener（
 new PropertyChangeListener（）{
 
 @Override 
 public void propertyChange（PropertyChangeEvent event）{
 if（event.getPropertyName（）。equals（Panel.background））{
 System.out.println（color changed）; 
} 
 
}）; 
 UIManager.put（Panel.background，new Color（255,0,0））; 
 break; 
 } 
} 
} catch（Exception e）{
 // Nimbus不可用。 
} 
 new RedPanels（）; 
} 
}）; 
} 
} 
  

解决方案

p> UIManager.getLookAndFeelDefaults（）。put（Panel.background，Color.RED）;


I want to use a different background color for all my JPanels in an application. How can I do that when using Nimbus Look and Feel?

I follow Changing the Color Theme to change the color of components in Nimbus Look and Feel.

It only works sometimes, randomly. If I set a PropertyChagneListener before I change the color, it is only notified once.

Here is some test code:

public class RedPanels extends JFrame {

  public RedPanels() {
    JPanel panel = new JPanel();
    add(panel);
    setPreferredSize(new Dimension(100, 100));
    pack();
    setVisible(true);
  }

  public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {

      @Override
      public void run() {

        try {
          for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                UIManager.setLookAndFeel(info.getClassName());
                UIManager.getDefaults().addPropertyChangeListener(
                                               new PropertyChangeListener() {

                  @Override
                  public void propertyChange(PropertyChangeEvent event) {
                    if (event.getPropertyName().equals("Panel.background")) {
                      System.out.println("color changed");
                    }

                });
                UIManager.put("Panel.background", new Color(255,0,0));
                break;
            }
          }
        } catch (Exception e) {
            // Nimbus is not available.
        }
        new RedPanels();
        }
    });
  }
}

解决方案

UIManager.getLookAndFeelDefaults().put("Panel.background", Color.RED);

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