JFileChooser.showSaveDialog:所有文件均变灰 [英] JFileChooser.showSaveDialog: All files greyed out

问题描述

我正在尝试使用JFileChooser获取要加载和保存的文件. openFileDialog()附带的对话框工作正常，但是当我使用saveFileDialog()方法时，对话框窗口中的所有文件名均变灰.无论是否使用FileFilter，都会发生这种情况(我的示例包括一个更好地显示我所看到的内容的示例).

I'm trying to use the JFileChooser to get files for loading and saving. The dialog that comes up with openFileDialog() works fine, but when I use the saveFileDialog() method, the dialog window has all the file names greyed out. This happens with or without a FileFilter (my example includes one to better show what I'm seeing).

这是一个最小的程序来说明:

Here's a minimal program to illustrate:

import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.filechooser.FileNameExtensionFilter;

public class Temp extends JFrame {
    public static void main(String[] args){
    JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JFileChooser chooser = new JFileChooser();
        FileNameExtensionFilter filter = new FileNameExtensionFilter("Text File", "txt");
        chooser.setFileFilter(filter);

        frame.setVisible(true);
        chooser.showOpenDialog(null);
        chooser.showSaveDialog(null);
    }
}

这是我在打开"对话框中看到的内容: 打开对话框

Here's what I see in the Open dialog: Open Dialog

这是我在保存"对话框中看到的内容: 保存对话框

Here's what I see in the Save dialog: Save Dialog

尽管显示为灰色，但保存对话框中的所有文件都是可选择的.

Despite being greyed out, all the files in the save dialog are selectable.

如果重要的话，我使用的是Mac/Mountain Lion和Java 7.

I'm on Mac/Mountain Lion and Java 7 if it matters.

这是预期的行为吗?有办法改变吗?

Is this expected behavior? Is there a way to change this?

(根据MadProgrammer的评论+下面的垃圾桶，这似乎与其他(本机)Mac应用程序的外观+感觉一致)

( per comments by MadProgrammer + trashgod below, this appears to be consistent with the look + feel of other (native) Mac apps)

推荐答案

我正在寻找在保存对话框中以正常"颜色显示的.txt文件.

这由特定于特定外观的FileChooserUI代表控制.感觉例如在Mac OS X上为AquaFileChooserUI.您可以使用其他的L& F，(费力地)编写自己的FileChooserUI，或开发自定义的

That's controlled by the FileChooserUI delegate specific to a particular Look & Feel, e.g. AquaFileChooserUI on Mac OS X. You can use a different L&F, (laboriously) write your own FileChooserUI, or develop a custom File Browser GUI.

这篇关于JFileChooser.showSaveDialog:所有文件均变灰的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！