以下範例展示如何在基於swing的應用程式中顯示帶有是和否選項的確認對話方塊。
使用以下API -
JOptionPane
- 建立標準對話方塊。JOptionPane.showConfirmDialog()
- 顯示確認訊息框。JOptionPane.YES_NO_OPTION
- 獲得是和否按鈕。範例
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是/否確認對話方塊");
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("點選~");
final JLabel label = new JLabel();
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int result = JOptionPane.showConfirmDialog(frame,"您確定要退出?", "Swing是/否確認對話方塊",
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE);
if(result == JOptionPane.YES_OPTION){
label.setText("選擇:是");
}else if (result == JOptionPane.NO_OPTION){
label.setText("選擇:否");
}else {
label.setText("未選擇~");
}
}
});
panel.add(button);
panel.add(label);
frame.getContentPane().add(panel, BorderLayout.CENTER);
}
}
執行上面範例程式碼,得到以下結果: