JOptionPane是/否选项确认对话框问题-Java

我创build了一个JOptionPane ，它只有两个buttonYES_NO_OPTION 。

JOptionPane.showConfirmDialogpopup后，我想点击YES BUTTON继续打开JFileChooser ，如果我点击了NO BUTTON它应该取消操作。

这似乎很容易，但我不知道我的错误在哪里。

代码片段：

 if(textArea.getLineCount() >= 1){ //The condition to show the dialog if there is text inside the textArea int dialogButton = JOptionPane.YES_NO_OPTION; JOptionPane.showConfirmDialog (null, "Would You Like to Save your Previous Note First?","Warning",dialogButton); if(dialogButton == JOptionPane.YES_OPTION){ //The ISSUE is here JFileChooser saveFile = new JFileChooser(); int saveOption = saveFile.showSaveDialog(frame); if(saveOption == JFileChooser.APPROVE_OPTION){ try{ BufferedWriter fileWriter = new BufferedWriter(new FileWriter(saveFile.getSelectedFile().getPath())); fileWriter.write(textArea.getText()); fileWriter.close(); }catch(Exception ex){ } } 

Answer 1

您需要查看调用showConfirmDialog的返回值。 IE：

 int dialogResult = JOptionPane.showConfirmDialog (null, "Would You Like to Save your Previous Note First?","Warning",dialogButton); if(dialogResult == JOptionPane.YES_OPTION){ // Saving code here } 

你正在对dialogButton进行testing，你正在使用它来设置对话框应该显示的button，而且这个variables永远不会被更新 – 所以dialogButton永远不会是除了JOptionPane.YES_NO_OPTION之外的任何东西。

每个用于showConfirmDialog的Javadoc：

返回：表示用户select的选项的整数

Answer 2

尝试这个，

 int dialogButton = JOptionPane.YES_NO_OPTION; int dialogResult = JOptionPane.showConfirmDialog(this, "Your Message", "Title on Box", dialogButton); if(dialogResult == 0) { System.out.println("Yes option"); } else { System.out.println("No Option"); } 

Answer 3

 int opcion = JOptionPane.showConfirmDialog(null, "Realmente deseas salir?", "Aviso", JOptionPane.YES_NO_OPTION); if (opcion == 0) { //The ISSUE is here System.out.print("si"); } else { System.out.print("no"); }