i want this program in JApplete ,pls help ,i ll try to change but it is not working ,giving so many errors,pls help me as early as posible
Hi everyone,
I am currently trying to serialize parts of a jtextpane using the java ObjectOutputStream to write it to disk and when i am reading the object back i am using the java ObjectInputStream.
When i read the api about the streams here is what they say
After reading this i decided to serialize my jtextpane objects using the above xml format but could not get it to work
I am providing a ruunable example so you guys can compile the source code and see what i mean
import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*; import java.beans.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.text.*; import javax.swing.text.rtf.*; public class XMLEcoderDecoder implements ActionListener, ItemListener { JFrame mainFrame = new JFrame("Frame"); JLabel labelerror = new JLabel(" ", SwingConstants.RIGHT); JButton bLoad = new JButton("Load"); JButton bSaveAs = new JButton("Save as"); JButton bSave = new JButton("Save"); JButton bInsertPic = new JButton("Insert picture"); JButton bBackgroundColor = new JButton("Set background color"); JFileChooser selectedFile = new JFileChooser(); JFileChooser insertIconFile = new JFileChooser(); JColorChooser backgroundChooser = new JColorChooser(); Color backgroundColor; JComboBox fontFamily; JComboBox fontSize = new JComboBox(); JTextPane mainTextPane = new JTextPane(); SimpleAttributeSet sas = new SimpleAttributeSet(); StyleContext sc = new StyleContext(); MutableAttributeSet mas; DefaultStyledDocument dse = new DefaultStyledDocument(sc); JScrollPane mainScrollPane = new JScrollPane(mainTextPane, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); RTFEditorKit rtfkit = new RTFEditorKit(); Dimension Size1 = new Dimension(); String SF = ""; public void initialize () { Container pane = mainFrame.getContentPane(); pane.setLayout(new FlowLayout()); mainFrame.setSize(250,300); mainFrame.setLocation(300,300); mainFrame.setBackground(Color.lightGray); //The below command line is the JTextPane using the rtf editor kit //for any rtf editing mainTextPane.setEditorKit(rtfkit); //The below command line sets the document that the JTextPane will be //be referencing to mainTextPane.setDocument(dse); Size1.width = 500; Size1.height = 300; mainScrollPane.setPreferredSize(Size1); pane.add(mainScrollPane); pane.add(bLoad); pane.add(bSaveAs); pane.add(bSave); pane.add(bInsertPic); pane.add(bBackgroundColor); combofontfamilyinitialize(); pane.add(fontFamily); combofontsizeinitialize(); pane.add(fontSize); pane.add(labelerror); mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); bLoad.addActionListener(this); bSaveAs.addActionListener(this); bSave.addActionListener(this); bInsertPic.addActionListener(this); bBackgroundColor.addActionListener(this); fontFamily.addItemListener(this); fontSize.addItemListener(this); mainFrame.pack(); mainFrame.setVisible(true); } public void combofontfamilyinitialize () { //This function fills the combo box with the system available font families GraphicsEnvironment ge1 = GraphicsEnvironment.getLocalGraphicsEnvironment(); String[] k = ge1.getAvailableFontFamilyNames(); fontFamily= new JComboBox(k); } public void combofontsizeinitialize () { //This function fills the combo box with font sizes fontSize.addItem("8"); fontSize.addItem("9"); fontSize.addItem("10"); fontSize.addItem("11"); fontSize.addItem("12"); fontSize.addItem("14"); fontSize.addItem("16"); fontSize.addItem("18"); fontSize.addItem("20"); fontSize.addItem("22"); fontSize.addItem("24"); fontSize.addItem("26"); fontSize.addItem("28"); fontSize.addItem("36"); fontSize.addItem("48"); fontSize.addItem("72"); } public void setAttributeSet(AttributeSet attr) { //This function only set the specified font set by the //attr variable to the text selected by the mouse int xStart, xFinish, k; xStart = mainTextPane.getSelectionStart(); xFinish = mainTextPane.getSelectionEnd(); k = xFinish - xStart; if(xStart != xFinish) { dse.setCharacterAttributes(xStart, k, attr, false); } else if(xStart == xFinish) { //The below two command line updates the JTextPane according to what //font that is being selected at a particular moment mas = rtfkit.getInputAttributes(); mas.addAttributes(attr); } //The below command line sets the focus to the JTextPane mainTextPane.grabFocus(); } public void open () { if(selectedFile.showOpenDialog(mainFrame) != JFileChooser.APPROVE_OPTION) { return; } try { File file1 = selectedFile.getSelectedFile(); SF = file1.toString(); FileInputStream fStream = new FileInputStream(SF); XMLDecoder stream = new XMLDecoder(fStream); Object obj; int i = 0; //The below for loop reads in all the two objects required //for the initialization of the objects in the program for(i=0;i<2;i++) { //The below command line reads the first object in the file obj = stream.readObject(); //The below command line initializes the first object in the file //coresponding to the objects in the program loadinitialize(obj); } stream.close(); fStream.close(); } catch (Exception e) { labelerror.setText("A document reading error has occured"); } } public void loadinitialize(Object Object1) { //This function initilizes all the objects in the program according //to the loading of a new file if(Object1 instanceof DefaultStyledDocument) { //The document must be first read into the DefaultStyledDocument //before any document rendering can be done to it dse = ((DefaultStyledDocument)Object1); mainTextPane.setDocument(dse); } else if(Object1 instanceof Color) { //The below command line loads the color as an object //using the user specified file name and sets the color //to the current JTextPane mainTextPane.setBackground((Color)Object1); } } public void saveas () { if(selectedFile.showSaveDialog(mainFrame) != JFileChooser.APPROVE_OPTION) { return; } try { File file2 = selectedFile.getSelectedFile(); SF = (file2.toString() + ".xml"); FileOutputStream fStream = new FileOutputStream(SF); XMLEncoder stream = new XMLEncoder(fStream); stream.writeObject(mainTextPane.getDocument()); stream.writeObject(mainTextPane.getBackground()); stream.flush(); stream.close(); fStream.close(); } catch (Exception e) { labelerror.setText("A document writing error has occured"); } } public void save () { try { String str1 = SF; if(str1.equals("")) { saveas(); return; } FileOutputStream fStream = new FileOutputStream(str1); XMLEncoder stream = new XMLEncoder(fStream); stream.writeObject(mainTextPane.getDocument()); stream.writeObject(mainTextPane.getBackground()); stream.flush(); stream.close(); fStream.close(); } catch (Exception e) { labelerror.setText("A document writing error has occured"); } } public void actionPerformed(ActionEvent event) { JComponent b = (JComponent)event.getSource(); String str3 = null; if(b == bLoad) { open(); } else if(b == bSaveAs) { saveas(); } else if(b == bSave) { save(); } else if(b == bInsertPic) { insertIconFile.setDialogType(JFileChooser.OPEN_DIALOG); insertIconFile.setDialogTitle("Select a picture to insert into document"); if(insertIconFile.showDialog(mainFrame,"Insert") != JFileChooser.APPROVE_OPTION) { return; } File g = insertIconFile.getSelectedFile(); ImageIcon image1 = new ImageIcon(g.toString()); mainTextPane.insertIcon(image1); mainTextPane.grabFocus(); } else if(b == bBackgroundColor) { backgroundColor = backgroundChooser.showDialog(mainFrame, "Color Chooser", Color.white); if(backgroundColor != null) { mainTextPane.setBackground(backgroundColor); } } } public void itemStateChanged(ItemEvent event) { JComponent c = (JComponent)event.getSource(); boolean d; if(c == fontFamily) { String j = (String)fontFamily.getSelectedItem(); StyleConstants.setFontFamily(sas, j); setAttributeSet(sas); } else if(c == fontSize) { String h = (String)fontSize.getSelectedItem(); int r = Integer.parseInt(h); StyleConstants.setFontSize(sas, r); setAttributeSet(sas); } } public static void main(String args[]) { XMLEcoderDecoder a = new XMLEcoderDecoder(); a.initialize(); } }When i insert an icon put in some styled text and change the background color of the jtextpane the file is written to disk with no exceptions but when i try to read back the same file only the previously background color is reloaded but the styled text and embedded icon are gone.
The thing is when i replace both the XMLEncoder and XMLDecoder with ObjectOutputStream and ObjectInputStream respectively everything works fine.
I don't know why can't serialize objects of my jtextpane but am i missing something.
I hope someone can help me with this problem
Thank You
Yours Sincerely
Richard West
