下面的示例展示如何在基于swing的应用程序中显示带有是，否和取消选项的确认对话框。
使用以下API -
JOptionPane- 创建标准对话框。JOptionPane.showConfirmDialog()- 显示确认消息框。JOptionPane.YES_NO_CANCEL_OPTION- 获取是，否和取消按钮。
示例
package com.yiibai.swingdemo;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class SwingTester {
public static void main(String[] args) {
createWindow();
}
private static void createWindow() {
JFrame frame = new JFrame("Swing确认对话框示例(yiibai.com)");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
createUI(frame);
frame.setSize(560, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void createUI(final JFrame frame){
JPanel panel = new JPanel();
LayoutManager layout = new FlowLayout();
panel.setLayout(layout);
JButton button = new JButton("点击我~");
final JLabel label = new JLabel();
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int result = JOptionPane.showConfirmDialog(frame,"确定要退出?", "Swing对话框",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE);
if(result == JOptionPane.YES_OPTION){
label.setText("你选择了: 是");
}else if (result == JOptionPane.NO_OPTION){
label.setText("你选择了: 否");
}else if (result == JOptionPane.CANCEL_OPTION){
label.setText("你选择了: 取消");
}else {
label.setText("什么也没有选择！");
}
}
});
panel.add(button);
panel.add(label);
frame.getContentPane().add(panel, BorderLayout.CENTER);
}
}
执行上面示例代码，得到以下结果：
