JFileChooser不显示文本文件

Question

由于某种原因，无论何时我尝试选择一个文本文件，即使目录中显然有一个文本文件，它也不会显示在文件选择器中。我的代码有问题吗？

package me.riley.logreader;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

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

public class LogReader {

    public static void main(String[] args) {
        ActionListeners actions = new ActionListeners();
        JFrame frame = new JFrame("Log Reader");

        //Window options 
        frame.setVisible(true);
        frame.setSize(500,400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Adds the panel to the frame
        JPanel panel = new JPanel();
        frame.add(panel);

        //Creates the button and places it inside the panel
        JButton button = new JButton("Click Here");
        button.setLocation(10, 10);
        panel.add(button);
        button.addActionListener(actions);

        //Allows user to open a text file
        JFileChooser filechooser = new JFileChooser();
        filechooser.setFileFilter(new FileNameExtensionFilter(".txt", "txt"));
        filechooser.setDialogTitle("Choose a text file");
        filechooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
        filechooser.showOpenDialog(null);

        }

    }

Answer 1

这是因为您已将FileSelectionMode设置为DIRECTORIES_ONLY。

删除filechooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);，它应该可以工作。