This section provides a tutorial example on how to use the getText() method of the javax.swing.JEditorPane class to implement a save file function.
In the next tutorial example, I want to show you how to use the setText() method and the
getText() method of the javax.swing.JEditorPane class to implement the "Open" function and the "Save" function
of my text editor.
/**
* JEditorPaneSave.java
* Copyright (c) 2009 by Dr. Herong Yang, http://www.herongyang.com/
*/
import java.io.*;
import java.nio.*;
import java.awt.event.*;
import javax.swing.*;
public class JEditorPaneSave implements ActionListener {
JFrame myFrame = null;
JEditorPane myPane = null;
public static void main(String[] a) {
(new JEditorPaneSave()).test();
}
private void test() {
myFrame = new JFrame("JEditorPane Save Test");
myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myFrame.setSize(300,200);
myPane = new JEditorPane();
myPane.setContentType("text/plain");
myPane.setText(
"JEditorPane is a text component to edit various kinds of"
+" content.\n\nThis component uses implementations of the"
+" EditorKit to accomplish its behavior.");
myFrame.setContentPane(myPane);
JMenuBar myBar = new JMenuBar();
JMenu myMenu = getFileMenu();
myBar.add(myMenu);
myFrame.setJMenuBar(myBar);
myFrame.setVisible(true);
}
private JMenu getFileMenu() {
JMenu myMenu = new JMenu("File");
JMenuItem myItem = new JMenuItem("Open");
myItem.addActionListener(this);
myMenu.add(myItem);
myItem = new JMenuItem("Save");
myItem.addActionListener(this);
myMenu.add(myItem);
return myMenu;
}
public void actionPerformed(ActionEvent e) {
String cmd = ((AbstractButton) e.getSource()).getText();
try {
if (cmd.equals("Open")) {
FileReader in = new FileReader("JEditorPane.txt");
char[] buffer = new char[1024];
int n = in.read(buffer);
String text = new String(buffer, 0, n);
myPane.setText(text);
in.close();
} else if (cmd.equals("Save")) {
FileWriter out = new FileWriter("JEditorPane.txt");
out.write(myPane.getText());
out.close();
}
} catch (Exception f) {
f.printStackTrace();
}
}
}
If you run this example, you will see a text editor pane displayed
with the initial text content and a menu bar with the "File" menu.
You can edit the text in the editor pane, use the menu to save the changes,
and open it again. See the picture below:
Sample programs listed in this section have been tested with JDK 1.6.0.
