如何等待FileChooser選擇？

Question

我想要做的就是使用FileChooser來選擇路徑。

的選擇之後，路徑應用下述實例使用。

我的問題是如何將強制所有等待的道路上，因爲否則程序，而無需等待的只是運行。

//GUI 
    JFrame frame = new JFrame("Window"); 
    FileChooser panel = new FileChooser(); 

    frame.addWindowListener(
     new WindowAdapter() { 
     public void windowClosing(WindowEvent e) { 
      System.exit(0); 
      } 
     } 
    ); 
    frame.getContentPane().add(panel,"Center"); 
    frame.setSize(panel.getPreferredSize()); 
    frame.setVisible(true); 
    if(panel.getPath() == null){ 

    } 
    String path = panel.getPath(); 

    //some additional stuff that does not need any pathinformation 
    ....... 
    //next step calculation which runs without waiting 
    Calculation calc = new Calculation(); 
    calc.run(path); 

在此先感謝

附：
這是我的ActionListner包含

 if (result == JFileChooser.CANCEL_OPTION) { 
     System.out.println("Cancel was selected"); 
     } 
     else if (result == JFileChooser.APPROVE_OPTION) { 
     path = chooser.getSelectedFile().getAbsolutePath(); 
     System.out.println("getCurrentDirectory(): " 

       + chooser.getCurrentDirectory()); 
     System.out.println("getSelectedFile() : " 
       + chooser.getSelectedFile()); 
     } 
     else { 
      System.out.println("No Selection "); 
     } 

Answer 1

你可以使用一個更監聽：

panel.addActionListener(new ActionListener() { 
    @Override 
    public void actionPerformed(ActionEvent e){ 
     if (e.getActionCommand() == JFileChooser.APPROVE_OPTION) { 
      file = panel.getSelectedFile(); 
      // Do what you want with selected file 
     } else { 
      // When user pressed close or "X" in the corder. 
     } 
    } 
}); 

代替String path = panel.getPath();

希望這有助於。