如何自定义Java Swing的标准颜色选择器

说明

以下示例展示了如何自定义Java Swing的标准颜色选择器。

我们正在使用以下 API。

• JColorChooser.setPreviewPanel() ： 删除或替换预览面板。

• JColorChooser.getChooserPanels() ： 获取选择器面板。

• JColorChooser.removeChooserPanel(panel) ： 删除选择器面板。

代码示例

package com.yiidian;

import javax.swing.*;
import javax.swing.colorchooser.AbstractColorChooserPanel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*;

public class SwingTester {
   public static void main(String[] args) {
      createWindow();
   }

   private static void createWindow() {    
      JFrame frame = new JFrame("一点教程网：Swing Tester");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      createUI(frame);
      frame.setSize(650, 400);      
      frame.setLocationRelativeTo(null);  
      frame.setVisible(true);
   }

   private static void createUI(final JFrame frame){  
      JPanel panel = new JPanel();
      LayoutManager layout = new FlowLayout();
      panel.setLayout(layout);       
      final JLabel colorLabel = new JLabel("Color Chooser Example");     
      final JColorChooser colorChooser = new JColorChooser();

      //No preview panel
      colorChooser.setPreviewPanel(new JPanel());
      //Add border 
      colorChooser.setBorder(BorderFactory.createTitledBorder("Choose Label Color"));
      AbstractColorChooserPanel[] panels = colorChooser.getChooserPanels();

      //Remove the panels while keeping the last one to show only
      for(int i = 0; i < panels.length - 1; i++){
         colorChooser.removeChooserPanel(panels[i]);
      }     
      colorChooser.getSelectionModel().addChangeListener(new ChangeListener() {
         @Override
         public void stateChanged(ChangeEvent e) {
            Color color = colorChooser.getColor();
            colorLabel.setForeground(color);
         }
      });
      panel.add(colorLabel);
      panel.add(colorChooser);
      frame.getContentPane().add(panel, BorderLayout.CENTER);    
   }  
}

执行效果如下：