输入目录显示文件(夹)（界面不是很好看）

输入路径(如d:/用户目录)列举路径下的文件(夹)

代码

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.File;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class 目录查找 {
    protected static final String LINE_SEPARATOR = System
.getProperty("line.separator");

    public 目录查找(JFrame f) {
        final JTextField text = new JTextField(30);
        final JButton b = new JButton("确定");
        final JTextArea area = new JTextArea();
        f.setTitle("查找目录下的文件");
        f.setBounds(100, 100, 500, 500);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
        JPanel p1 = new JPanel();
        p1.add(text);
        p1.add(b);
        f.add(p1, BorderLayout.NORTH);
        f.add(new JScrollPane(area), BorderLayout.CENTER);
        area.setEditable(false);
        b.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                String str_dir = text.getText();
                File file = new File(str_dir);
                if (file.exists() && file.isDirectory()) {
                    area.setText(null);
                    String[] name = file.list();
                    for (String s : name)
                        area.append(s + LINE_SEPARATOR);
                }
            }
        });
        text.addKeyListener(new KeyAdapter() {//添加键盘监听
            @Override
            public void keyPressed(KeyEvent arg0) {
                if (arg0.getKeyChar() == KeyEvent.VK_ENTER) {
                    b.doClick();
                }
            }

        });
    }

    public static void main(String[] args) {
        目录查找 f = new 目录查找(new JFrame());
    }
}