Swing 範例 - 顯示帶有自定義按鈕的確認對話方塊

以下範例展示瞭如何在基於 swing 的應用程式中顯示帶有自定義按鈕文字的確認對話方塊。

我們正在使用以下 API。

• JOptionPane - 建立一個標準對話方塊。

• JOptionPane.showOptionDialog() - 顯示帶有多個選項的訊息提示。

• JOptionPane.YES_NO_OPTION - 獲取“是”和“否”按鈕。

範例

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 Tester");
      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("Click Me!");
      final JLabel label = new JLabel();
      button.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
            String[] options = {"Yes! Please.", "No! Not now."}; 
            int result = JOptionPane.showOptionDialog(
               frame,
               "Sure? You want to exit?", 
               "Swing Tester",            
               JOptionPane.YES_NO_OPTION,
               JOptionPane.QUESTION_MESSAGE,
               null,     //no custom icon
               options,  //button titles
               options[0] //default button
            );
            if(result == JOptionPane.YES_OPTION){
               label.setText("You selected: Yes! Please");
            }else if (result == JOptionPane.NO_OPTION){
               label.setText("You selected: No! Not now.");
            }else {
               label.setText("None selected");
            }
         }
      });

      panel.add(button);
      panel.add(label);
      frame.getContentPane().add(panel, BorderLayout.CENTER);    
   }  
} 

輸出