Question

swing 颜色选择问题。。。。要的效果以下图为例！

Answer 1

//Test.java
import javax.swing.*;
import javax.swing.colorchooser.*;
import java.awt.*;
import java.awt.event.*;

public class Test extends JApplet {
//变量定义
private JColorChooser chooser = new JColorChooser();
private JButton button = new JButton("Show Color Chooser");
private JDialog dialog;

//初始化程序
public void init() {
//制作界面容器
Container contentPane = getContentPane();

contentPane.setLayout(new FlowLayout());
contentPane.add(button, BorderLayout.CENTER);
//选择框
chooser.setPreviewPanel(new PreviewPanel());

//事件监听
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {

if(dialog == null)
dialog = JColorChooser.createDialog(
Test.this, // parent comp
"Pick A Color", // dialog title
false, // modality
chooser,
null, null);

dialog.setVisible(true);
}
});
}
//制作预览面板
class PreviewPanel extends JPanel {
public PreviewPanel() {
setPreferredSize(new Dimension(0,100));
setBorder(BorderFactory.createRaisedBevelBorder());
}
public void paintComponent(Graphics g) {
Dimension size = getSize();

g.setColor(getForeground());
g.fillRect(0,0,size.width,size.height);
}
}
}