Messagebox that displays a different randum number every 2 secs

Question

well im having trouble with putting a messagebox that displays a different randum number every 2 secs and closes with a close button. it goes in the print menu option of this simple text editor,you shoud also be able to work in the background while this message box is been displayed.
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.rtf.*;
import javax.swing.event.*;
import javax.swing.filechooser.*;
import javax.swing.undo.*;
import java.util.Timer;
import java.util.TimerTask;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.beans.*;
  -------------------| Simple Text Editor example application using Java 1.3 with Swing |--------------
public class SimpleTextEditor extends JFrame
        private JTextPane textpane;
        private JMenuBar mb;
        private JFileChooser chooser,picChooser;
        private Hashtable actions;
        private JPopupMenu popup;
        private JMenuItem exit, newDoc, save, open, saveAs,print;
        private About ab;
        private StyledEditorKit edkit;
        private RTFEditorKit rtfkit;
        private DefaultStyledDocument doc;
        private MyDocumentListener doclistener;
       private MyUndoableEditListener undolistener;
         //Useful variables
        private String filename="untitled1.txt",filetype=".txt";
        private File thisfile;
        protected String FileFormats[],FileDescriptions[],PicFileFormats[],PicFileDescriptions[];
        protected boolean DocumentIsUnedited=true, DocumentIsSaved=false;
        public static int SQUARE=0,TRIANGLE=1,CIRCLE=2;
        public String newline="\n";
        protected UndoManager undo ;
        protected UndoAction undoAction;
        protected RedoAction redoAction;
        // These are the actions used in the menus and on the toolbar
        protected Action bold, italic, underline, alignleft, alignright, aligncentre;
        protected Action spellchecker, alignjustify, more, cut, copy, paste, tools[];
        public SimpleTextEditor()
                super("SimpleTextEditor - untitled1.rtf");
                this.setLocation(200,200);
                this.setIconImage(getMyIcon("Icon.gif").getImage());
                getContentPane().setLayout(new BorderLayout());
                undo = new UndoManager();
                //Set up the file formats and file choosers etc
                FileFormats = new String[]{".rtf",".txt",".java",".bat"};
                FileDescriptions = new String[]{"Rich Text Format Files","Text Files","Java Source Files","DOS Batch Files"};
                PicFileFormats = new String[]{".gif",".bmp",".jpg"};
                PicFileDescriptions = new String[]{"Gif Images","Bitmap Images","JPEG Images"};
                chooser = new JFileChooser();
                picChooser = new JFileChooser();
                picChooser.setAccessory(new ImagePreview(picChooser));
                javax.swing.filechooser.FileFilter defaultFilter = new SimpleFilter(FileFormats[0],FileDescriptions[0]);
                javax.swing.filechooser.FileFilter defaultPicFilter = new SimpleFilter(PicFileFormats[0],PicFileDescriptions[0]);
                for(int i=1;i<FileFormats.length;i++){
                        chooser.addChoosableFileFilter(new SimpleFilter(FileFormats,FileDescriptions[i]));
for(int i=1;i<PicFileFormats.length;i++){
picChooser.addChoosableFileFilter(new SimpleFilter(PicFileFormats[i],PicFileDescriptions[i]));
chooser.setFileFilter(defaultFilter);
picChooser.setFileFilter(defaultPicFilter);
File working = new File("C:/Documents");
if(!working.exists()){
working= new File("C:/MyDocuments");
if(!working.exists()) working = new File("C:/");
if(working.exists()) {
chooser.setCurrentDirectory(working);
picChooser.setCurrentDirectory(working);
// Set up Document object and Editor kits
doc = new DefaultStyledDocument();
edkit = new StyledEditorKit();
rtfkit = new RTFEditorKit();
// Set up Listener objects
doclistener= new MyDocumentListener();
undolistener= new MyUndoableEditListener();
doc.addDocumentListener(doclistener);
doc.addUndoableEditListener(undolistener);
//Set up main GUI content
textpane=new JTextPane(doc);
textpane.setPreferredSize(new Dimension(400,400));
textpane.setMinimumSize(new Dimension(400,400));
JScrollPane scroller=new JScrollPane(textpane);
scroller.setPreferredSize(new Dimension(400,400));
mb=new JMenuBar(); // Create a menu bar
JMenu File=new JMenu("File");
JMenu Help=new JMenu("Help");
//Sort out Actions etc
createActionTable(textpane);
createToolbarActions();
JMenu Style=createStyleMenu();
undoAction = new UndoAction();
redoAction = new RedoAction();
//Create Style, Edit and Format menus + Toolbar
JMenu Edit=createEditMenu();
JMenu Format=createFormatMenu();
JMenu Insert = createInsertMenu();
JToolBar toolbar = createToolbar();
getContentPane().add("North",toolbar);
// set up main menu items with ActionListeners
newDoc=new JMenuItem("New");
newDoc.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
newDoc();
exit=new JMenuItem("Exit");
exit.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
exit();
print=new JMenuItem("Print");
print.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
print();
save=new JMenuItem("Save");
save.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
save();
saveAs=new JMenuItem("Save As...");
saveAs.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
saveas();
open=new JMenuItem("Open...");
open.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
open();
JMenuItem about=new JMenuItem("About");
about.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
ab=new About(SimpleTextEditor.this);
ab.show();
ab.setLocation(400,300);
// Create the popup menu
popup = createEditMenu().getPopupMenu();
popup.addSeparator();
popup.add(createStyleMenu());
popup.add(createFormatMenu());
textpane.add(popup);
// set up Help and File menus
Help.add(about);
File.add(newDoc);
File.add(open);
File.add(print);
File.add(save);
File.add(saveAs);
File.addSeparator();
File.add(exit);
// add the menus to the menubar
mb.add(File);
mb.add(Edit);
mb.add(Format);
mb.add(Style);
mb.add(Insert);
mb.add(Help);
this.setJMenuBar(mb);
getContentPane().add("Center",scroller);
// Add mouse Listener to the textpane for popup events
textpane.addMouseListener(new MouseAdapter(){
public void mousePressed(MouseEvent e)
if(e.isPopupTrigger())
popup.show(textpane, e.getX(), e.getY());
e.consume();
public void mouseReleased(MouseEvent e)
if(e.isPopupTrigger())
popup.show(textpane, e.getX(), e.getY());
e.consume();
//-----------------| Main active methods |------------------
public void exit()// Main Exit method
if(DocumentIsUnedited){//Check that document is saved/unedited etc
dispose();
setVisible(false);
System.exit(0);
else{
switch(showNotSavedDialog("Exit")){
case JOptionPane.YES_OPTION: save(); exit(); break;
case JOptionPane.NO_OPTION: DocumentIsUnedited=true;exit();break;
case JOptionPane.CANCEL_OPTION: break;
public void newDoc()//Method to create new documents
if(DocumentIsUnedited){
initDoc();
filename="untitled.txt";
filetype=".txt";
resetTitle();
else
switch(showNotSavedDialog("New Document")){
case JOptionPane.YES_OPTION: save(); newDoc(); break;
case JOptionPane.NO_OPTION: DocumentIsUnedited=true;newDoc();break;
case JOptionPane.CANCEL_OPTION: break;
private void initDoc()// Helper method to initialize a new document
doc = null;
doc = (DefaultStyledDocument)edkit.createDefaultDocument();
doc.addDocumentListener(doclistener);
textpane.setStyledDocument(doc);
public void print()
new TimerTestFrame();
class TimerTestFrame extends JFrame
Timer timer;
TimerTestFrame()
super();
timer = new Timer(true);
TimerTask task = new MessageTimer(TimerTestFrame.this);
timer.schedule(task,2000,2000);
class MessageTimer extends TimerTask
Component parent;
public MessageTimer(Component parent)
this.parent = parent;
public void run()
int randnum = (1 +(int)(Math.random()*10));
JOptionPane.showMessageDialog(parent,""+randnum,"Timer Message",JOptionPane.INFORMATION_MESSAGE);
public void saveas()
int n = chooser.showSaveDialog(this);
if(n==0){
filename=chooser.getSelectedFile().getName();
boolean ext = false;
setFiletype();
thisfile = new File(chooser.getCurrentDirectory(),filename);
DocumentIsSaved=true;
save();
resetTitle();
repaint();
public void save()// Save method. Used by "Save As..." as well
if( DocumentIsSaved)
try
FileOutputStream out = new FileOutputStream(thisfile);
if((filetype.equals(".rtf"))||(filetype.equals(".doc"))){
rtfkit.write(out,doc,0,doc.getLength());
else edkit.write(out,doc,0,doc.getLength());
catch(Exception e)
System.out.println(""+e.getMessage()+"");
DocumentIsUnedited=true;
else saveas();
public void open()// Find a file and read it into the document
if(DocumentIsUnedited){
int n = chooser.showOpenDialog(this); // get the outcome of the dialog
if(n==0){
File file = chooser.getSelectedFile();
filename=chooser.getName(file);
setFiletype();
resetTitle();
initDoc();
try
FileInputStream in= new FileInputStream(file);
if(filetype.equals(".rtf")){
rtfkit.read(in,doc,0);
edkit.read(in,doc,0);
catch(Exception e)
System.out.println(""+e.getMessage()+"");
thisfile= new File(chooser.getCurrentDirectory(),chooser.getSelectedFile().getName());
DocumentIsUnedited=true;
DocumentIsSaved=true;
resetTitle();
repaint();
else
switch(showNotSavedDialog("Open")){
case JOptionPane.YES_OPTION: save(); open(); break;
case JOptionPane.NO_OPTION: DocumentIsUnedited=true; open(); break;
case JOptionPane.CANCEL_OPTION: break;
private void setFiletype()// Helper method to get the filetype of saved/opened documents
filetype=null;
for(int i=0;i<FileFormats.length;i++){
if(filename.toLowerCase().endsWith(FileFormats[i])) filetype = FileFormats[i];
else{
for(i=0;i<filename.length();i++){
if(filename.toLowerCase().charAt(i)=='.')
filetype=filename.substring(i);
if(filetype==null) filetype=".txt";
private void resetTitle()
this.setTitle("SimpleTextEditor - "+filename);
private ImageIcon getMyIcon(String filename){
ImageIcon pic = new ImageIcon("Images/"+filename);
return pic;
private int showNotSavedDialog(String title)// Helper method to create "Save? Yes/No/Cancel" dialogs
int n = JOptionPane.showConfirmDialog(this,"The last document has not been saved. \nDo you want to save it first?",
title,
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE);
return n;
//-----------------| Listeners and Helper classes |----------------
protected class MyDocumentListener implements DocumentListener
public void insertUpdate(DocumentEvent e) {
SimpleTextEditor.this.DocumentIsUnedited=false;
public void removeUpdate(DocumentEvent e) {
SimpleTextEditor.this.DocumentIsUnedited=false;
public void changedUpdate(DocumentEvent e) {
SimpleTextEditor.this.DocumentIsUnedited=false;
protected class MyUndoableEditListener implements UndoableEditListener {
public void undoableEditHappened(UndoableEditEvent e) {
//Remember the edit and update the menus.
undo.addEdit(e.getEdit());
undoAction.updateUndoState();
redoAction.updateRedoState();
//Helper class for FileFilter, allows a description to be assigned to a filetype
protected class SimpleFilter extends javax.swing.filechooser.FileFilter
String type,des;
public SimpleFilter(String type, String des)
this.des=des;
this.type=type;
public boolean accept(File f){
if(f.isDirectory())return true;
else{
if(f.getName().toLowerCase().endsWith(type)) return true;
else return false;
public String getDescription(){
return des;
//------------| Methods to help create menus and toolbar |--------------
protected JMenu createStyleMenu()
JMenu menu = new JMenu("Style");
menu.add(bold);
menu.add(italic);
menu.add(underline);
menu.addSeparator();
menu.add(new StyledEditorKit.FontSizeAction("12", 12));
menu.add(new StyledEditorKit.FontSizeAction("14", 14));
menu.add(new StyledEditorKit.FontSizeAction("18", 18));
menu.addSeparator();
menu.add(new StyledEditorKit.FontFamilyAction("Serif","Serif"));
menu.add(new StyledEditorKit.FontFamilyAction("SansSerif","SansSerif"));
menu.addSeparator();
Action red = new StyledEditorKit.ForegroundAction("Red", new Color(255,0,0));
red.putValue(Action.SMALL_ICON,getMyIcon("red.gif"));
menu.add(red);
Action green = new StyledEditorKit.ForegroundAction("Green", new Color(0,150,0));
green.putValue(Action.SMALL_ICON,getMyIcon("green.gif"));
menu.add(green);
Action blue = new StyledEditorKit.ForegroundAction("Blue", new Color(0,50,150));
blue.putValue(Action.SMALL_ICON,getMyIcon("blue.gif"));
menu.add(blue);
Action black = new StyledEditorKit.ForegroundAction("Black", new Color(0,0,0));
black.putValue(Action.SMALL_ICON,getMyIcon("black.gif"));
menu.add(black);
menu.add(more);
return menu;
protected JMenu createEditMenu() {
JMenu menu = new JMenu("Edit");
menu.add(undoAction);
menu.add(redoAction);
menu.addSeparator();
menu.add(cut);
menu.add(copy);
menu.add(paste);
menu.addSeparator();
Action selectall=getActionByName(DefaultEditorKit.selectAllAction);
selectall.putValue(Action.NAME, "Select All");
menu.add(selectall);
return menu;
protected JMenu createFormatMenu(){
JMenu menu = new JMenu("Format");
menu.add(spellchecker);
menu.add(alignleft);
menu.add(alignright);
menu.add(aligncentre);
menu.add(alignjustify);
return menu;
protected JMenu createInsertMenu(){
JMenu menu = new JMenu("Insert");
Action insertimage = new InsertImageAction(this);
menu.add(insertimage);
Action insertdate = new InsertDateAction();
menu.add(insertdate);
Action insertline = new InsertLineAction();
menu.add(insertline);
JMenu bullets =new JMenu("Bullet Points");
bullets.add(new InsertBulletAction(CIRCLE,"Circle"));
bullets.add(new InsertBulletAction(TRIANGLE,"Triangle"));
bullets.add(new InsertBulletAction(SQUARE,"Square"));
menu.add(bullets);
return menu;
public JToolBar createToolbar(){
JToolBar bar= new JToolBar();
JButton newbutton=new JButton(getMyIcon("new.gif"));
newbutton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
newDoc();
bar.add(newbutton);
JButton savebutton=new JButton(getMyIcon("save.gif"));
savebutton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
save();
bar.add(savebutton);
JButton openbutton=new JButton(getMyIcon("open.gif"));
openbutton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
open();
bar.add(openbutton);
bar.addSeparator();
for(int i=0;i<tools.length;i++){
JButton button=new JButton();
button.setAction(tools[i]);
button.setIcon(getMyIcon(tools[i].getValue(Action.NAME)+".gif"));
button.setText("");
bar.add(button);
if((i==2)||(i==6))bar.addSeparator();
return bar;
public void createToolbarActions(){
bold = new StyledEditorKit.BoldAction();
bold.putValue(Action.NAME, "Bold");
italic = new StyledEditorKit.ItalicAction();
italic.putValue(Action.NAME, "Italic");
underline = new StyledEditorKit.UnderlineAction();
underline.putValue(Action.NAME, "Underline");
more = new MoreColorsAction();
cut = getActionByName(DefaultEditorKit.cutAction);
cut.putValue(Action.NAME, "Cut");
copy = getActionByName(DefaultEditorKit.copyAction);
copy.putValue(Action.NAME, "Copy");
paste = getActionByName(DefaultEditorKit.pasteAction);
paste.putValue(Action.NAME, "Paste");
alignleft = new StyledEditorKit.AlignmentAction("Left Justify",StyleConstants.ALIGN_LEFT);
alignright = new StyledEditorKit.AlignmentAction("Right Justify",StyleConstants.ALIGN_RIGHT);
aligncentre = new StyledEditorKit.AlignmentAction("Align Centre",StyleConstants.ALIGN_CENTER);
alignjustify = new StyledEditorKit.AlignmentAction("Fully Justify",StyleConstants.ALIGN_JUSTIFIED);
spellchecker = new StyledEditorKit.AlignmentAction("Spell Checker",StyleConstants.ALIGN_JUSTIFIED);
tools = new Action[]{  cut, copy, paste, bold, italic, underline, more, alignleft, alignright, aligncentre, alignjustify, spellchecker };
// helper methods to enable menu creators to get their actions by name
private void createActionTable(JTextComponent textComponent) {
actions = new Hashtable();
Action[] actionsArray = textComponent.getActions();
for (int i = 0; i < actionsArray.length; i++) {
Action a = actionsArray[i];
actions.put(a.getValue(Action.NAME), a);
private Action getActionByName(String name) {
return (Action)(actions.get(name));
//----------------| Custom Actions |--------------------
class InsertImageAction extends AbstractAction {
protected SimpleTextEditor parent;
public InsertImageAction(SimpleTextEditor parent){
super("Image...");
this.parent=parent;
public void actionPerformed(ActionEvent e) {
int n = parent.picChooser.showOpenDialog(parent);
if(n==0){
String filename=picChooser.getSelectedFile().getName();
File file = new File(picChooser.getCurrentDirectory(),filename);
Icon pic = new ImageIcon(file.getAbsolutePath());
textpane.insertIcon(pic);
SimpleTextEditor.this.repaint();
class InsertDateAction extends AbstractAction {
public InsertDateAction(){
super("Date");
public void actionPerformed(ActionEvent ble) {
Calendar c= Calendar.getInstance();
String[] months= new String[]{"01","02","03","04","05","06","07","08","09","10","11","12"};
textpane.replaceSelection(c.get(c.DAY_OF_MONTH)+"/"+months[c.get(c.MONTH)]+"/"+c.get(c.YEAR));
class InsertLineAction extends AbstractAction {
public InsertLineAction(){
super("Horizontal line");
public void actionPerformed(ActionEvent e) {
Icon pic = new ImageIcon("Images/line.gif");
textpane.insertIcon(pic);
class InsertBulletAction extends AbstractAction {
protected int type;
protected String filenames[] = new String[]{"square.gif","triangle.gif","circle.gif"};
public InsertBulletAction(int type,String name){
super(name);
this.type=type;
this.putValue(SMALL_ICON,new ImageIcon("Images/"+filenames[type]));
public void actionPerformed(ActionEvent e) {
Icon pic = new ImageIcon("Images/"+filenames[type]);
textpane.insertIcon(pic);
textpane.replaceSelection(" ");
class MoreColorsAction extends AbstractAction {
public MoreColorsAction(){
super("More Colors");
public void actionPerformed(ActionEvent e){
AttributeSet as = textpane.getCharacterAttributes();
SimpleAttributeSet sas = new SimpleAttributeSet(as);
Color newColor = JColorChooser.showDialog(
SimpleTextEditor.this,
"C

Answer 1

Here you go guys:
Peace!
import javax.swing.*;
import javax.swing.Timer;
import javax.swing.border.BevelBorder;
import javax.swing.text.*;
import javax.swing.text.rtf.*;
import javax.swing.event.*;
import javax.swing.filechooser.*;
import javax.swing.undo.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.beans.*;
  -------------------| Simple Text Editor example application using Java 1.3 with Swing |--------------
public class SimpleTextEditor extends JFrame
    private JTextPane textpane;
    private JMenuBar mb;
    private JFileChooser chooser,picChooser;
    private Hashtable actions;
    private JPopupMenu popup;
    private JMenuItem exit, newDoc, save, open, saveAs,print;
    private About ab;
    private StyledEditorKit edkit;
    private RTFEditorKit rtfkit;
    private DefaultStyledDocument doc;
    private MyDocumentListener doclistener;
    private MyUndoableEditListener undolistener;
    //Useful variables
    private String filename = "untitled1.txt",filetype = ".txt";
    private File thisfile;
    protected String FileFormats[],FileDescriptions[],PicFileFormats[],PicFileDescriptions[];
    protected boolean DocumentIsUnedited = true, DocumentIsSaved = false;
    public static int SQUARE = 0,TRIANGLE = 1,CIRCLE = 2;
    public String newline = "\n";
    protected UndoManager undo;
    protected UndoAction undoAction;
    protected RedoAction redoAction;
    // These are the actions used in the menus and on the toolbar
    protected Action bold, italic, underline, alignleft, alignright, aligncentre;
    protected Action spellchecker, alignjustify, more, cut, copy, paste, tools[];
    public SimpleTextEditor()
        super("SimpleTextEditor - untitled1.rtf");
        this.setLocation(200, 200);
        this.setIconImage(getMyIcon("Icon.gif").getImage());
        getContentPane().setLayout(new BorderLayout());
        undo = new UndoManager();
        //Set up the file formats and file choosers etc
        FileFormats = new String[]{".rtf", ".txt", ".java", ".bat"};
        FileDescriptions = new String[]{"Rich Text Format Files", "Text Files", "Java Source Files", "DOS Batch Files"};
        PicFileFormats = new String[]{".gif", ".bmp", ".jpg"};
        PicFileDescriptions = new String[]{"Gif Images", "Bitmap Images", "JPEG Images"};
        chooser = new JFileChooser();
        picChooser = new JFileChooser();
        picChooser.setAccessory(new ImagePreview(picChooser));
        javax.swing.filechooser.FileFilter defaultFilter = new SimpleFilter(FileFormats[0], FileDescriptions[0]);
        javax.swing.filechooser.FileFilter defaultPicFilter = new SimpleFilter(PicFileFormats[0], PicFileDescriptions[0]);
        for (int i = 1; i < FileFormats.length; i++)
            chooser.addChoosableFileFilter(new SimpleFilter(FileFormats, FileDescriptions[i]));
for (int i = 1; i < PicFileFormats.length; i++)
picChooser.addChoosableFileFilter(new SimpleFilter(PicFileFormats[i], PicFileDescriptions[i]));
chooser.setFileFilter(defaultFilter);
picChooser.setFileFilter(defaultPicFilter);
File working = new File("C:/Documents");
if (!working.exists())
working = new File("C:/MyDocuments");
if (!working.exists()) working = new File("C:/");
if (working.exists())
chooser.setCurrentDirectory(working);
picChooser.setCurrentDirectory(working);
// Set up Document object and Editor kits
doc = new DefaultStyledDocument();
edkit = new StyledEditorKit();
rtfkit = new RTFEditorKit();
// Set up Listener objects
doclistener = new MyDocumentListener();
undolistener = new MyUndoableEditListener();
doc.addDocumentListener(doclistener);
doc.addUndoableEditListener(undolistener);
//Set up main GUI content
textpane = new JTextPane(doc);
textpane.setPreferredSize(new Dimension(400, 400));
textpane.setMinimumSize(new Dimension(400, 400));
JScrollPane scroller = new JScrollPane(textpane);
scroller.setPreferredSize(new Dimension(400, 400));
mb = new JMenuBar(); // Create a menu bar
JMenu File = new JMenu("File");
JMenu Help = new JMenu("Help");
//Sort out Actions etc
createActionTable(textpane);
createToolbarActions();
JMenu Style = createStyleMenu();
undoAction = new UndoAction();
redoAction = new RedoAction();
//Create Style, Edit and Format menus + Toolbar
JMenu Edit = createEditMenu();
JMenu Format = createFormatMenu();
JMenu Insert = createInsertMenu();
JToolBar toolbar = createToolbar();
getContentPane().add("North", toolbar);
// set up main menu items with ActionListeners
newDoc = new JMenuItem("New");
newDoc.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
newDoc();
exit = new JMenuItem("Exit");
exit.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
exit();
print = new JMenuItem("Print");
print.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
print();
save = new JMenuItem("Save");
save.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
save();
saveAs = new JMenuItem("Save As...");
saveAs.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
saveas();
open = new JMenuItem("Open...");
open.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
open();
JMenuItem about = new JMenuItem("About");
about.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
ab = new About(SimpleTextEditor.this);
ab.show();
ab.setLocation(400, 300);
// Create the popup menu
popup = createEditMenu().getPopupMenu();
popup.addSeparator();
popup.add(createStyleMenu());
popup.add(createFormatMenu());
textpane.add(popup);
// set up Help and File menus
Help.add(about);
File.add(newDoc);
File.add(open);
File.add(print);
File.add(save);
File.add(saveAs);
File.addSeparator();
File.add(exit);
// add the menus to the menubar
mb.add(File);
mb.add(Edit);
mb.add(Format);
mb.add(Style);
mb.add(Insert);
mb.add(Help);
this.setJMenuBar(mb);
getContentPane().add("Center", scroller);
// Add mouse Listener to the textpane for popup events
textpane.addMouseListener(new MouseAdapter()
public void mousePressed(MouseEvent e)
if (e.isPopupTrigger())
popup.show(textpane, e.getX(), e.getY());
e.consume();
public void mouseReleased(MouseEvent e)
if (e.isPopupTrigger())
popup.show(textpane, e.getX(), e.getY());
e.consume();
//-----------------| Main active methods |------------------
public void exit()// Main Exit method
if (DocumentIsUnedited)
{//Check that document is saved/unedited etc
dispose();
setVisible(false);
System.exit(0);
else
switch (showNotSavedDialog("Exit"))
case JOptionPane.YES_OPTION:
save();
exit();
break;
case JOptionPane.NO_OPTION:
DocumentIsUnedited = true;
exit();
break;
case JOptionPane.CANCEL_OPTION:
break;
public void newDoc()//Method to create new documents
if (DocumentIsUnedited)
initDoc();
filename = "untitled.txt";
filetype = ".txt";
resetTitle();
else
switch (showNotSavedDialog("New Document"))
case JOptionPane.YES_OPTION:
save();
newDoc();
break;
case JOptionPane.NO_OPTION:
DocumentIsUnedited = true;
newDoc();
break;
case JOptionPane.CANCEL_OPTION:
break;
private void initDoc()// Helper method to initialize a new document
doc = null;
doc = (DefaultStyledDocument) edkit.createDefaultDocument();
doc.addDocumentListener(doclistener);
textpane.setStyledDocument(doc);
public void print()
new TimerTestDialog(this);
class TimerTestDialog extends JDialog
TimerTestDialog(Frame parent)
super(parent);
setLocationRelativeTo(parent);
setupDialog();
setModal(false); // this will allow you to do still stuff with the main frame
* sorry, using a Timer instead of your original TimerTask - it's simpler
Timer t = new Timer(2000, ticker);
t.start();
private void setupDialog()
Container c = getContentPane();
c.setLayout(new BorderLayout());
c.add(getDisplayPanel(), BorderLayout.CENTER);
c.add(getButtonPanel(), BorderLayout.SOUTH);
setSize(300, 150);
setVisible(true);
private Component getDisplayPanel()
label = new JLabel("---", JLabel.CENTER);
label.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
JPanel panel = new JPanel(new BorderLayout());
panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JPanel backing = new JPanel(new BorderLayout());
backing.add(label, BorderLayout.NORTH); // this will ensure the label doesn't go all tall
panel.add(backing, BorderLayout.CENTER);
return panel;
private Component getButtonPanel()
JPanel panel = new JPanel(new BorderLayout());
panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JPanel backing = new JPanel(new BorderLayout());
JButton closeButton = new JButton("close");
closeButton.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
dispose();
backing.add(closeButton, BorderLayout.NORTH);
panel.add(backing, BorderLayout.EAST);
return panel;
private ActionListener ticker = new ActionListener()
public void actionPerformed(ActionEvent e)
label.setText(String.valueOf(getRandomNumber()));
private int getRandomNumber()
return r.nextInt(10) + 1; // shift from 0-9 to 1-10
private JLabel label;
* NOTE - this is the best way to use random stuff in java. if you use instance members
* you can sometimes get the same result each time. not really sure how that works but
* i've seen it happen
private static Random r = new Random();
public void saveas()
int n = chooser.showSaveDialog(this);
if (n == 0)
filename = chooser.getSelectedFile().getName();
boolean ext = false;
setFiletype();
thisfile = new File(chooser.getCurrentDirectory(), filename);
DocumentIsSaved = true;
save();
resetTitle();
repaint();
public void save()// Save method. Used by "Save As..." as well
if (DocumentIsSaved)
try
FileOutputStream out = new FileOutputStream(thisfile);
if ((filetype.equals(".rtf")) || (filetype.equals(".doc")))
rtfkit.write(out, doc, 0, doc.getLength());
else
edkit.write(out, doc, 0, doc.getLength());
catch (Exception e)
System.out.println("" + e.getMessage() + "");
DocumentIsUnedited = true;
else
saveas();
public void open()// Find a file and read it into the document
if (DocumentIsUnedited)
int n = chooser.showOpenDialog(this); // get the outcome of the dialog
if (n == 0)
File file = chooser.getSelectedFile();
filename = chooser.getName(file);
setFiletype();
resetTitle();
initDoc();
try
FileInputStream in = new FileInputStream(file);
if (filetype.equals(".rtf"))
rtfkit.read(in, doc, 0);
edkit.read(in, doc, 0);
catch (Exception e)
System.out.println("" + e.getMessage() + "");
thisfile = new File(chooser.getCurrentDirectory(), chooser.getSelectedFile().getName());
DocumentIsUnedited = true;
DocumentIsSaved = true;
resetTitle();
repaint();
else
switch (showNotSavedDialog("Open"))
case JOptionPane.YES_OPTION:
save();
open();
break;
case JOptionPane.NO_OPTION:
DocumentIsUnedited = true;
open();
break;
case JOptionPane.CANCEL_OPTION:
break;
private void setFiletype()// Helper method to get the filetype of saved/opened documents
filetype = null;
for (int i = 0; i < FileFormats.length; i++)
if (filename.toLowerCase().endsWith(FileFormats[i]))
filetype = FileFormats[i];
else
for (i = 0; i < filename.length(); i++)
if (filename.toLowerCase().charAt(i) == '.')
filetype = filename.substring(i);
if (filetype == null) filetype = ".txt";
private void resetTitle()
this.setTitle("SimpleTextEditor - " + filename);
private ImageIcon getMyIcon(String filename)
ImageIcon pic = new ImageIcon("Images/" + filename);
return pic;
private int showNotSavedDialog(String title)// Helper method to create "Save? Yes/No/Cancel" dialogs
int n = JOptionPane.showConfirmDialog(this, "The last document has not been saved. \nDo you want to save it first?",
title,
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE);
return n;
//-----------------| Listeners and Helper classes |----------------
protected class MyDocumentListener implements DocumentListener
public void insertUpdate(DocumentEvent e)
SimpleTextEditor.this.DocumentIsUnedited = false;
public void removeUpdate(DocumentEvent e)
SimpleTextEditor.this.DocumentIsUnedited = false;
public void changedUpdate(DocumentEvent e)
SimpleTextEditor.this.DocumentIsUnedited = false;
protected class MyUndoableEditListener implements UndoableEditListener
public void undoableEditHappened(UndoableEditEvent e)
//Remember the edit and update the menus.
undo.addEdit(e.getEdit());
undoAction.updateUndoState();
redoAction.updateRedoState();
//Helper class for FileFilter, allows a description to be assigned to a filetype
protected class SimpleFilter extends javax.swing.filechooser.FileFilter
String type,des;
public SimpleFilter(String type, String des)
this.des = des;
this.type = type;
public boolean accept(File f)
if (f.isDirectory())
return true;
else
if (f.getName().toLowerCase().endsWith(type))
return true;
else
return false;
public String getDescription()
return des;
//------------| Methods to help create menus and toolbar |--------------
protected JMenu createStyleMenu()
JMenu menu = new JMenu("Style");
menu.add(bold);
menu.add(italic);
menu.add(underline);
menu.addSeparator();
menu.add(new StyledEditorKit.FontSizeAction("12", 12));
menu.add(new StyledEditorKit.FontSizeAction("14", 14));
menu.add(new StyledEditorKit.FontSizeAction("18", 18));
menu.addSeparator();
menu.add(new StyledEditorKit.FontFamilyAction("Serif", "Serif"));
menu.add(new StyledEditorKit.FontFamilyAction("SansSerif", "SansSerif"));
menu.addSeparator();
Action red = new StyledEditorKit.ForegroundAction("Red", new Color(255, 0, 0));
red.putValue(Action.SMALL_ICON, getMyIcon("red.gif"));
menu.add(red);
Action green = new StyledEditorKit.ForegroundAction("Green", new Color(0, 150, 0));
green.putValue(Action.SMALL_ICON, getMyIcon("green.gif"));
menu.add(green);
Action blue = new StyledEditorKit.ForegroundAction("Blue", new Color(0, 50, 150));
blue.putValue(Action.SMALL_ICON, getMyIcon("blue.gif"));
menu.add(blue);
Action black = new StyledEditorKit.ForegroundAction("Black", new Color(0, 0, 0));
black.putValue(Action.SMALL_ICON, getMyIcon("black.gif"));
menu.add(black);
menu.add(more);
return menu;
protected JMenu createEditMenu()
JMenu menu = new JMenu("Edit");
menu.add(undoAction);
menu.add(redoAction);
menu.addSeparator();
menu.add(cut);
menu.add(copy);
menu.add(paste);
menu.addSeparator();
Action selectall = getActionByName(DefaultEditorKit.selectAllAction);
selectall.putValue(Action.NAME, "Select All");
menu.add(selectall);
return menu;
protected JMenu createFormatMenu()
JMenu menu = new JMenu("Format");
menu.add(spellchecker);
menu.add(alignleft);
menu.add(alignright);
menu.add(aligncentre);
menu.add(alignjustify);
return menu;
protected JMenu createInsertMenu()
JMenu menu = new JMenu("Insert");
Action insertimage = new InsertImageAction(this);
menu.add(insertimage);
Action insertdate = new InsertDateAction();
menu.add(insertdate);
Action insertline = new InsertLineAction();
menu.add(insertline);
JMenu bullets = new JMenu("Bullet Points");
bullets.add(new InsertBulletAction(CIRCLE, "Circle"));
bullets.add(new InsertBulletAction(TRIANGLE, "Triangle"));
bullets.add(new InsertBulletAction(SQUARE, "Square"));
menu.add(bullets);
return menu;
public JToolBar createToolbar()
JToolBar bar = new JToolBar();
JButton newbutton = new JButton(getMyIcon("new.gif"));
newbutton.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
newDoc();
bar.add(newbutton);
JButton savebutton = new JButton(getMyIcon("save.gif"));
savebutton.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
save();
bar.add(savebutton);
JButton openbutton = new JButton(getMyIcon("open.gif"));
openbutton.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
open();
bar.add(openbutton);
bar.addSeparator();
for (int i = 0; i < tools.length; i++)
JButton button = new JButton();
button.setAction(tools[i]);
button.setIcon(getMyIcon(tools[i].getValue(Action.NAME) + ".gif"));
button.setText("");
bar.add(button);
if ((i == 2) || (i == 6)) bar.addSeparator();
return bar;
public void createToolbarActions()
bold = new StyledEditorKit.BoldAction();
bold.putValue(Action.NAME, "Bold");
italic = new StyledEditorKit.ItalicAction();
italic.putValue(Action.NAME, "Italic");
underline = new StyledEditorKit.UnderlineAction();
underline.putValue(Action.NAME, "Underline");
more = new MoreColorsAction();
cut = getActionByName(DefaultEditorKit.cutAction);
cut.putValue(Action.NAME, "Cut");
copy = getActionByName(DefaultEditorKit.copyAction);
copy.putValue(Action.NAME, "Copy");
paste = getActionByName(DefaultEditorKit.pasteAction);
paste.putValue(Action.NAME, "Paste");
alignleft = new StyledEditorKit.AlignmentAction("Left Justify", StyleConstants.ALIGN_LEFT);
alignright = new StyledEditorKit.AlignmentAction("Right Justify", StyleConstants.ALIGN_RIGHT);
aligncentre = new StyledEditorKit.AlignmentAction("Align Centre", StyleConstants.ALIGN_CENTER);
alignjustify = new StyledEditorKit.AlignmentAction("Fully Justify", StyleConstants.ALIGN_JUSTIFIED);
spellchecker = new StyledEditorKit.AlignmentAction("Spell Checker", StyleConstants.ALIGN_JUSTIFIED);
tools = new Action[]{cut, copy, paste, bold, italic, underline, more, alignleft, alignright, aligncentre, alignjustify, spellchecker};
// helper methods to enable menu creators to get their actions by name
private void createActionTable(JTextComponent textComponent)
actions = new Hashtable();
Action[] actionsArray = textComponent.getActions();
for (int i = 0; i < actionsArray.length; i++)
Action a = actionsArray[i];
actions.put(a.getValue(Action.NAME), a);
private Action getActionByName(String name)
return (Action) (actions.get(name));
//----------------| Custom Actions |--------------------
class InsertImageAction extends AbstractAction
protected SimpleTextEditor parent;
public InsertImageAction(SimpleTextEditor parent)
super("Image...");
this.parent = parent;
public void actionPerformed(ActionEvent e)
int n = parent.picChooser.showOpenDialog(parent);
if (n == 0)
String filename = picChooser.getSelectedFile().getName();
File file = new File(picChooser.getCurrentDirectory(), filename);
Icon pic = new ImageIcon(file.getAbsolutePath());
textpane.insertIcon(pic);
SimpleTextEditor.this.repaint();
class InsertDateAction extends AbstractAction
public InsertDateAction()
super("Date");
public void actionPerformed(ActionEvent ble)
Calendar c = Calendar.getInstance();
String[] months = new String[]{"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"};
textpane.replaceSelection(c.get(c.DAY_OF_MONTH) + "/" + months[c.get(c.MONTH)] + "/" + c.get(c.YEAR));
class InsertLineAction extends AbstractAction
public InsertLineAction()
super("Horizontal line");
public void actionPerformed(ActionEvent e)
Icon pic = new ImageIcon("Images/line.gif");
textpane.insertIcon(pic);
class InsertBulletAction extends AbstractAction
protected int type;
protected String filenames[] = new String[]{"square.gif", "triangle.gif", "circle.gif"};
public InsertBulletAction(int type, String name)
super(name);
this.type = type;
this.putValue(SMALL_ICON, new ImageIcon("Images/" + filenames[type]));
public void actionPerformed(ActionEvent e)
Icon pic = new ImageIcon("Images/" + filenames[type]);
textpane.insertIcon(pic);
textpane.replaceSelection(" ");
class MoreColorsAction extends AbstractAction
public MoreColorsAction()
super("More Colors");
public void actionPerformed(ActionEvent e)
AttributeSet as = textpane.getCharacterAttributes();
SimpleAttributeSet sas = new SimpleAttributeSet(as);
Color newColor = JColorChooser.showDialog(
SimpleTextEditor.this,
"Choose Text Color",
doc.getForeground(as));
if (newColor != null)
StyleConstants.setForeground(sas, newColor);
textpane.setCharacterAttributes(sas, true);
SimpleTextEditor.this.repaint();
class UndoAction extends AbstractAction
public UndoAction()
super("Undo");
setEnabled(false);
public void actionPerformed(ActionEvent e)
try
undo.undo();
catch (CannotUndoException ex)
System.out.println("Unable to undo: " + ex);
ex.printStackTrace();
updateUndoState();
redoAction.updateRedoState();
protected void updateUndoState()
if (undo.canUndo())
setEnabled(true);
putValue(Action.NAME, undo.getUndoPresentationName());
else
setEnabled(false);
putValue(Action.NAME, "Undo");
class RedoAction extends AbstractAction
public RedoAction()
super("Redo");
setEnabled(false);
public void actionPerformed(ActionEvent e)
try
undo.redo();
catch (CannotRedoException ex)
System.out.println("Unable to redo: " + ex);
ex.printStackTrace();
updateRedoState();
undoAction.updateUndoState();
protected void updateRedoState()
if (undo.canRedo())
setEnabled(true);
putValue(Action.NAME, undo.getRedoPresentationName());
else
setEnabled(false);
putValue(Action.NAME, "Redo");
//-------------| Very nice Image Previewer 'borrowed' from Sun's Java Tutorial
class ImagePreview extends JComponent implements PropertyChangeListener
ImageIcon thumbnail = null;
File file = null;
public ImagePreview(JFileChooser fc)
setPreferredSize(new Dimension(100, 50));
fc.addPropertyChangeListener(this);
public void loadImage()
if (file == null)
return;
ImageIcon tmpIcon = new ImageIcon(file.getPath());
if (tmpIcon.getIconWidth() > 90)
thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(90, -1,
Image.SCALE_DEFAULT));
else
thumbnail = tmpIcon;