在JOptionPane.showOptionDialog（）中设置组件焦点 [英] Setting component focus in JOptionPane.showOptionDialog()

问题描述

为了在输入对话框中拥有自定义的按钮标题，我创建了下面的代码：

  String key = null; 
 JTextField txtKey = new JTextField（）; 
 int answerKey = JOptionPane.showOptionDialog（this，new Object [] {pleaseEnterTheKey，txtKey}，decryptionKey，JOptionPane.OK_CANCEL_OPTION，JOptionPane.QUESTION_MESSAGE，null，new Object [] {okCaption，cancelCaption}，okCaption）; 
 if（answerKey == JOptionPane.OK_OPTION&& txtKey.getText（）！= null）{
 key = txtKey.getText（）; 
 
 
 
 $ b 
如何移动焦点（光标）显示对话框的文本字段？
 
 
 
 更新  
 
 
不为我工作，我的意思是textfield没有关注：
操作系统：Fedora的 - 侏儒
  public class Test { 
 public static void main（String [] args）{
 String key = null; 
 JTextField txtKey = new JTextField（）; 
 txtKey.addAncestorListener（new RequestFocusListener（））; 
 int answerKey = JOptionPane.showOptionDialog（null，new Object [] {Please enter the key：，txtKey}，Title，JOptionPane.OK_CANCEL_OPTION，JOptionPane.QUESTION_MESSAGE，null，new Object [] {OKKK ，CANCELLLL}，OKKK）; 
 if（answerKey == JOptionPane.OK_OPTION&& txtKey.getText（）！= null）{
 key = txtKey.getText（）; 
 
 
 
 
 $ div class =h2_lin>解决方案

Dialog Focus 显示了如何轻松设置焦点在模态对话框中的任何组件。

In order to have custom button captions in an input dialog, I created the following code:

String key = null;
JTextField txtKey = new JTextField();        
int answerKey = JOptionPane.showOptionDialog(this, new Object[] {pleaseEnterTheKey, txtKey}, decryptionKey, JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, new Object[] {okCaption, cancelCaption}, okCaption);        
if (answerKey == JOptionPane.OK_OPTION && txtKey.getText() != null) {
  key = txtKey.getText();
}

How can I move the focus (cursor) to the text field as the dialog is displayed?

UPDATE

This does not work for me, I mean the textfield has no focus: OS: Fedora - Gnome

public class Test {
  public static void main(String[] args) {
    String key = null;
    JTextField txtKey = new JTextField();
    txtKey.addAncestorListener(new RequestFocusListener());
    int answerKey = JOptionPane.showOptionDialog(null, new Object[]{"Please enter the key:", txtKey}, "Title", JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, new Object[]{"OKKK", "CANCELLLL"}, "OKKK");
    if (answerKey == JOptionPane.OK_OPTION && txtKey.getText() != null) {
      key = txtKey.getText();
    }
  }
}

解决方案

Dialog Focus shows how you can easily set the focus on any component in a modal dialog.

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