下面的示例展示了如何在基于swing的应用程序中创建和使用颜色选择器。
使用以下API -
JColorChooser()- 创建标准颜色选择器，允许用户从托盘中选择颜色。JColorChooser.getColor();- 获取颜色选择器的选定颜色。JColorChooser.getSelectionModel().addChangeListener()- 当用户从颜色选择器选择任何颜色时处理事件。
示例
package com.yiibai.swingdemo;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import javax.swing.JColorChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class SwingTester {
public static void main(String[] args) {
createWindow();
}
private static void createWindow() {
JFrame frame = new JFrame("Swing使用颜色选择器(yiibai.com)");
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("颜色选择器示例");
final JColorChooser colorChooser = new JColorChooser();
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);
}
}
执行上面示例代码，得到以下结果 -
