试图让聚焦到JTextPane中双击JList的元素（爪哇）后

Question

问题：

我有以下的JList我添加到textPane，并显示它在将插入符移动。但是，双击Jlist元素后，文本会被插入，但插入符号不会出现在JTextPane中。

这是下面的代码：

listForSuggestion = new JList(str.toArray()); 
     listForSuggestion.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 
     listForSuggestion.setSelectedIndex(0); 
     listForSuggestion.setVisibleRowCount(visibleRowCount); 
     listScrollPane = new JScrollPane(listForSuggestion); 
     MouseListener mouseListener = new MouseAdapter() { 

      @Override 
      public void mouseClicked(MouseEvent mouseEvent) { 
       JList theList = (JList) mouseEvent.getSource(); 
       if (mouseEvent.getClickCount() == 2) { 
        int index = theList.locationToIndex(mouseEvent.getPoint()); 
        if (index >= 0) { 
         Object o = theList.getModel().getElementAt(index); 
         //System.out.println("Double-clicked on: " + o.toString()); 
         //Set the double clicked text to appear on textPane 
         String completion = o.toString(); 
         int num= textPane.getCaretPosition(); 
         textPane.select(num, num); 
         textPane.replaceSelection(completion); 
         textPane.setCaretPosition(num + completion.length()); 
         int pos = textPane.getSelectionEnd(); 
         textPane.select(pos, pos); 
         textPane.replaceSelection(""); 
         textPane.setCaretPosition(pos); 
         textPane.moveCaretPosition(pos); 
        } 
       } 
       theList.clearSelection(); 

如何“散焦”上的jList选择任何想法​​，或使文本插入后插入符号出现在的JTextPane？

如果不够清楚，我会详细说明。请帮忙，谢谢！

Answer 1

看一看在玩的对焦方法JComponent

具体grabFocus和requestFocusInWindow

如果​​后添加textPane.grabFocus()例如，会发生什么？

Answer 2

尽管与您的问题没有关系，但您可能希望查看List Action，它试图以更一般的方式处理此类请求。

编辑：

这里是我的简单SSCCE表示不需要的invokeLater：

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 

public class ListActionTest 
{ 
public static void main(String[] args) 
    throws Exception 
{ 
    final JTextField textField = new JTextField(); 

    Action displayAction = new AbstractAction() 
    { 
    public void actionPerformed(ActionEvent e) 
    { 
    JList list = (JList)e.getSource(); 
    System.out.println(list.getSelectedValue()); 
    textField.setText(list.getSelectedValue().toString()); 
    textField.requestFocusInWindow(); 
    } 
    }; 

    String[] data = { "zero", "one", "two", "three", "four", "five" }; 
    JList list = new JList(data); 

    ListAction la = new ListAction(list, displayAction); 

    JFrame frame = new JFrame(); 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    frame.getContentPane().add(new JScrollPane(list)); 
    frame.add(textField, BorderLayout.SOUTH); 
    frame.setSize(400, 100); 
    frame.setLocationRelativeTo(null); 
    frame.setVisible(true); 
} 
}