import java.awt.*; import java.awt.event.*; import java.io.*; import javax.swing.*; public class Editor extends JFrame implements ActionListener { private JEditorPane textPane = new JEditorPane( ); public Editor( ) { super("Editor v1.0"); Container content = getContentPane( ); // unecessary in 1.5+ content.add(new JScrollPane(textPane), BorderLayout.CENTER); JMenu menu = new JMenu("File"); menu.add(makeMenuItem("Open")); menu.add(makeMenuItem("Save")); menu.add(makeMenuItem("Quit")); JMenuBar menuBar = new JMenuBar( ); menuBar.add(menu); setJMenuBar(menuBar); setSize(300, 300); setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } public void actionPerformed(ActionEvent e) { String command = e.getActionCommand( ); if (command.equals("Quit")) System.exit(0); else if (command.equals("Open")) loadFile( ); else if (command.equals("Save")) saveFile( ); } private void loadFile ( ) { JFileChooser chooser = new JFileChooser( ); int result = chooser.showOpenDialog(this); if (result == JFileChooser.CANCEL_OPTION) return; try { File file = chooser.getSelectedFile( ); java.net.URL url = file.toURL( ); textPane.setPage(url); } catch (Exception e) { textPane.setText("Could not load file: " + e); } } private void saveFile( ) { JFileChooser chooser = new JFileChooser( ); chooser.showSaveDialog(this); // Save file data... } private JMenuItem makeMenuItem( String name ) { JMenuItem m = new JMenuItem( name ); m.addActionListener( this ); return m; } public static void main(String[] s) { new Editor().setVisible(true); } }