全屏显示的目录查看器

import java.awt.BorderLayout; import java.awt.DisplayMode; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.event.FocusAdapter; import java.awt.event.FocusEvent; import java.io.File; import java.util.Date; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; public class ContentInfo extends JFrame { final JTextField field = new JTextField(20); final JTextArea area = new JTextArea(); final String pathname = field.getText(); final JScrollPane pane = new JScrollPane(area); public static void main(String[] args) { new ContentInfo("目录查看器"); } public ContentInfo(String title) { super(title); area.setLineWrap(true); area.setEditable(false); field.setText(pathname); field.addFocusListener(new FocusAdapter() { public void focusLost(FocusEvent e) { area.setText(info(field.getText())); } @Override public void focusGained(FocusEvent e) { field.setText(""); area.setText(""); } }); add(field, BorderLayout.NORTH); add(pane, BorderLayout.CENTER); GraphicsDevice device = GraphicsEnvironment .getLocalGraphicsEnvironment().getDefaultScreenDevice(); DisplayMode mode = device.getDisplayMode(); setBounds(0, 0, mode.getWidth(), mode.getHeight()); show(); setDefaultCloseOperation(EXIT_ON_CLOSE); setVisible(true); } private String info(String pathname) { StringBuffer buffer = new StringBuffer(); File file = new File(pathname); File[] files; if (file.isDirectory()) { files = file.listFiles(); for (int i = 0; i < files.length; i++) { buffer.append(new Date(files[i].lastModified()) + "\t\t"); if (files[i].isDirectory()) { buffer.append("<DIR>\t"); } else { buffer.append(files[i].length() + "\t"); } buffer.append(files[i].getName() + "\n"); } } return buffer.toString(); } }