我也给你一个记事本代码，供你参考（有点简单，不要笑
）：
/*!Begin Snippet:file*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import *;
/**
* Demonstrates the class {@link JFileChooser}. This class extends
* class {@link @JPanel}.
*
* @author author name
* @version 1.0.0
*/
public class TextEditor extends JPanel {
/* Line separator */
private final static String NEW_LINE =
System.getProperty("line.separator");
/* Standard error stream */
private static PrintWriter stdErr =
new PrintWriter(System.err, true);
private JButton openButton;
private JButton saveButton;
private TextArea textArea;
private JFileChooser fileChooser;
/**
* Creates a window.
*
* @param args not used.
*/
public static void main(String[] args) {
JFrame frame = new JFrame("TextEditor");
frame.setContentPane(new TextEditor());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400,400);
frame.setVisible(true);
}
/**
* Creates a Graphical User Interface.
*/
public TextEditor() {
setBackground(Color.white);
// Create the components
openButton = new JButton("Open");
saveButton = new JButton("Save");
openButton.setFont(new Font("Serif", Font.BOLD, 30));
saveButton.setFont(new Font("Serif", Font.BOLD, 30));
textArea = new TextArea();
fileChooser = new JFileChooser();
//fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
// Register the listeners for the buttons
openButton.addActionListener(new OpenButtonListener());
saveButton.addActionListener(new SaveButtonListener());
// Add components to the container
setLayout(new BorderLayout());
add(openButton, BorderLayout.NORTH);
add(textArea, BorderLayout.CENTER);
add(saveButton, BorderLayout.SOUTH);
}
/**
* This inner class handles button clicks for the Open button.
*/
class OpenButtonListener implements ActionListener {
/**
* Opens a text file.
*
* @param event the event object.
*/
public void actionPerformed(ActionEvent event) {
int result = fileChooser.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION) {
try {
File file = fileChooser.getSelectedFile();
BufferedReader input =
new BufferedReader(new FileReader(file));
String line = input.readLine();
while (line != null) {
textArea.append(line + NEW_LINE);
line = input.readLine();
}
input.close();
} catch (IOException ioe) {
stdErr.println(ioe.toString());
}
}
}
}
/**
* This inner class handles button clicks for the Save button.
*/
class SaveButtonListener implements ActionListener {
/**
* Saves a text file.
*
* @param event the event object.
*/
public void actionPerformed(ActionEvent event) {
int result = fileChooser.showSaveDialog(null);
if (result == JFileChooser.APPROVE_OPTION) {
try {
File file = fileChooser.getSelectedFile();
PrintWriter output =
new PrintWriter(new FileWriter(file));
output.print(textArea.getText());
output.close();
} catch (IOException ioe) {
stdErr.println(ioe.toString());
}
}
}
}
}
/*!End Snippet:file*/
2007-11-27 18:14
myfrist.rar