i need help for this notepad system to put a FONT in my notepad system like what the window notepad has..pls someone help me...this is my code

//** NotePad using Java Which supports encryption and decryption

//** Java Packages
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.text.*;
import javax.swing.event.*;

//**Main Class
public class Latest
{
public static void main (String[] args)
{
new JMenuExample();
}
} // End of Main Class

//**Class JMenuExample
class JMenuExample extends JFrame implements ActionListener
{
//**Defines Menu & Menu items.
JMenu fileJMenu = new JMenu ("File");
JMenu editJMenu = new JMenu("Edit");
JMenu viewJMenu = new JMenu("View");
JMenu aboutJMenu = new JMenu("About");

JMenuItem newJMenuItem = new JMenuItem("New");
JMenuItem openJMenuItem = new JMenuItem("Open");
JMenuItem saveJMenuItem = new JMenuItem("Save");
JMenuItem saveasJMenuItem = new JMenuItem("Save as");
JMenuItem quitJMenuItem = new JMenuItem("Quit");
JMenuItem encryptJMenuItem = new JMenuItem("Encrypt");
JMenuItem decryptJMenuItem = new JMenuItem("Decrypt");
JMenuItem decryptusercodeJMenuItem = new JMenuItem("Decrypt User Code");
JMenuItem findJMenuItem = new JMenuItem("Find");
JMenuItem replaceJMenuItem = new JMenuItem("Replace");
JMenuItem wordJMenuItem = new JMenuItem("Word Count");
JMenuItem specificJMenuItem = new JMenuItem("Specific Word Count");
JMenuItem helpJMenuItem = new JMenuItem("Help");
JMenuItem personalJMenuItem = new JMenuItem("Personal Information");

JTextArea outputArea = new JTextArea();
JScrollPane mScrollPane = new JScrollPane();
JFileChooser mJFileChooser = new JFileChooser();
int flag;
Doc mDocument;
String mWord;
String mSource[]={"a","b","c","d","e","f","g","h","i","j","k","l","m","n",
"o","p","q","r","s","t","u","v","w","x","y","z",
"0","1","2","3","4","5","6","7","8","9","+",","};
String mDestination[]={" ·- "," -··· "," -·-· "," -·· "," · "," ··-· "," --· "," ···· " /*A to H*/
," ·· "," ·--- "," -·- "," ·-·· "," -- "," -· "," --- "," ·--· "/*I to P*/
," --·- "," ·-· "," ··· "," - "," ··- "," ···- "," ·-- "," -··- "," -·-- "," --·· "/*Q to Z*/
," ----- "," ·---- "," ··--- "," ···-- "," ····- "," ····· "," -···· "," --··· "," ---·· "," ----· "/*0 to9*/
," ·-·-·- "," --··-- "};/*Period & Comma*/

//** Constructor JMenuExample
//** Here declares Container, Menu bar, Menu Items such as New, Open etc.
public JMenuExample()
{
super ("Parthiban Notepad with Encryption and Decryption");
setSize(450,450);

//**Defining Container and adding scroll pane to it.
Container container=getContentPane();
container.add(mScrollPane, BorderLayout.CENTER);
mScrollPane.getViewport().add(outputArea, null);

//**Definging Menu bar and adding menu items to it.
JMenuBar m =new JMenuBar();
setJMenuBar(m);

m.add(fileJMenu);
m.add(editJMenu);
m.add(viewJMenu);
m.add(aboutJMenu);

fileJMenu.add(newJMenuItem);
fileJMenu.add(openJMenuItem);
fileJMenu.addSeparator();
fileJMenu.add(saveJMenuItem);
fileJMenu.add(saveasJMenuItem);
fileJMenu.addSeparator();
fileJMenu.add(quitJMenuItem);

editJMenu.add(findJMenuItem);
editJMenu.add(replaceJMenuItem);
editJMenu.addSeparator();
editJMenu.add(encryptJMenuItem);
editJMenu.add(decryptJMenuItem);
editJMenu.addSeparator();
editJMenu.add(decryptusercodeJMenuItem);

viewJMenu.add(wordJMenuItem);
viewJMenu.addSeparator();
viewJMenu.add(specificJMenuItem);

aboutJMenu.add(helpJMenuItem);
aboutJMenu.addSeparator();
aboutJMenu.add(personalJMenuItem);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
show();
mDocument=new Doc();

//**Listner calling for quit menu item.
quitJMenuItem.addActionListener(this);

//**Listener for new menu item.
newJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{ flag = 0;
mDocument.mFileName="";
mDocument.text="";
outputArea.setText(mDocument.text);
setTitle(mDocument.mFileName+"Untitled-Notepad");

}
});

//**Listener for open menu item.
openJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{ flag = 1;
if (JFileChooser.APPROVE_OPTION == mJFileChooser.showOpenDialog(null))
{
mDocument.mFileName = mJFileChooser.getSelectedFile().getPath();
mDocument.openFile ();
outputArea.setText(mDocument.text);
setTitle(mDocument.mFileName+"-Notepad");
}
}
});

//**Listener for save menu item.
saveJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
if (flag ==0)
{
if (JFileChooser.APPROVE_OPTION == mJFileChooser.showSaveDialog(null))
{
flag=1;
mDocument.mFileName = mJFileChooser.getSelectedFile().getPath();
mDocument.text= outputArea.getText();
mDocument.saveToFile ();
setTitle( mDocument.mFileName);
}

}
else
{
mDocument.mFileName = mJFileChooser.getSelectedFile().getPath();
mDocument.text= outputArea.getText();
mDocument.saveToFile ();
setTitle( mDocument.mFileName);
}
}

});

//**Listener for saveas menu item.
saveasJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
if (JFileChooser.APPROVE_OPTION == mJFileChooser.showSaveDialog(null))
{
flag =1;
mDocument.mFileName = mJFileChooser.getSelectedFile().getPath();
mDocument.text= outputArea.getText();
mDocument.saveToFile ();
setTitle(mDocument.mFileName);
}
}
});

//**Listener for find menu item.
findJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
int mIndex=0;
mDocument.text=outputArea.getText();
do
{
mWord = JOptionPane.showInputDialog("Enter a word to be found:",mWord);
if (mWord==null)
{
return;
}
if (mWord.compareTo("")==0)
{
return;
}
mIndex=mDocument.text.indexOf(mWord,mIndex);
if (mIndex==-1)
{
JOptionPane.showMessageDialog(null,"Not Found."
,"Find",JOptionPane.ERROR_MESSAGE);
}
else
{
outputArea.setSelectionStart(mIndex);
mIndex=mIndex+mWord.length();
outputArea.setSelectionEnd(mIndex);
}

}
while (true);
}
});

//**Listener for replace menu item.
replaceJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
int mIndex=0,mOption,mCount;
String mWord1,mWord2;
mDocument.text=outputArea.getText();
mWord1 = JOptionPane.showInputDialog("Enter the word to be replaced:");
if (mWord1==null)
{
return;
}
if (mWord1.compareTo("")==0)
{
return;
}
mWord2 = JOptionPane.showInputDialog("Replace all " + mWord1 + " to:");
if (mWord2==null)
{
return;
}
if (mWord2.compareTo("")==0)
{
return;
}
mCount=mDocument.specifiedWordCount(mWord1);
if (mCount==0)
{
JOptionPane.showMessageDialog(null,"Not Found.","",JOptionPane.ERROR_MESSAGE);
return;
}
mOption=JOptionPane.showConfirmDialog(null,"Are you sure to replace all"
+ " " + mWord1 + " 's with " + mWord2 + " ?");
if (mOption==JOptionPane.YES_OPTION)
{
mDocument.replace(mWord1,mWord2);
outputArea.setText(mDocument.text);
JOptionPane.showMessageDialog(null," Replacement done.");
}
}
});

//**Listener for encrypt menu item.
encryptJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
mDocument.text= outputArea.getText();
mDocument.encrypt(mSource,mDestination);
outputArea.setText(mDocument.text);
}
});

//**Listener for decrypt menu item.
decryptJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
mDocument.text= outputArea.getText();
mDocument.encrypt(mDestination,mSource);
outputArea.setText(mDocument.text);
}
});

//**Listener for word count menu item.
wordJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
mDocument.text=outputArea.getText();
JOptionPane.showMessageDialog(null
,"Number of Words = " + mDocument.wordCount()
,"Word Count",JOptionPane.INFORMATION_MESSAGE);
}
});

//**Listener for specific word count menu item.
specificJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
mDocument.text=outputArea.getText();
mWord = JOptionPane.showInputDialog(null,"Enter the word :",mWord,JOptionPane.DEFAULT_OPTION);
if (mWord==null)
{
return;
}
if (mWord.compareTo("")==0)
{
return;
}
JOptionPane.showMessageDialog(null
,"Number of " + mWord + "'s = " + mDocument.specifiedWordCount(mWord)
,"Specified Word Count",JOptionPane.INFORMATION_MESSAGE);
}
});

//**Listener for personal menu item.
personalJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
JOptionPane.showMessageDialog(null,"This is a Java Program written by PARTHIBAN,\nStudent UEL Program,\nfor the Project.","Personal Information",JOptionPane.INFORMATION_MESSAGE);
}
});

//**Listener for help menu item.
helpJMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
JOptionPane.showMessageDialog(null, "New will makes a new Text Area.\nOpen opens the documents in the System.\nSave will saves the data.\nQuit will quit the text editor.\nFind will hels to find a particular word which user key's in.\nReplace, replaces the word with another word(user key's in both words).\nWord count give the number of words used.\nSpecific word count gives the number of times a particular word used in a particular document(User can key in the word).\nEncrypt will encrypt the text with 'Morse Code'.\nDecrypt will decrypt it back to text.", "Help",JOptionPane.INFORMATION_MESSAGE);

}
});

}

//**Method actionPerformed for the quit action listener.
public void actionPerformed(ActionEvent event)
{
if(event.getSource() == quitJMenuItem)
{
int mOption = JOptionPane.showConfirmDialog(null, "Are you sure to Quit?");
if(mOption == JOptionPane.YES_OPTION)
System.exit(0);
}

}

}

//**Class document
class Doc
{
String text;
String mFileName;
int hasChanged;

//**Constructor openFile.
void openFile ()
{
try
{
File myFile = new File (mFileName);
char[] myCharSet = new char[(int)myFile.length()];
int n = 0;
FileReader myFileReader = new FileReader(myFile);
while(myFileReader.ready())
{
n += myFileReader.read(myCharSet, n, (int)myFile.length() - n);
}
myFileReader.close();
text=new String(myCharSet, 0, n);
hasChanged = 0;
}
catch (IOException e)
{
System.out.println("Error in reading document");
}
}

//**Constructor saveToFile.
void saveToFile ()
{
try
{
File myFile = new File (mFileName);
FileWriter myFileWriter = new FileWriter(myFile);
myFileWriter.write(text);
myFileWriter.close();
hasChanged = 0;
}
catch (IOException e)
{
System.out.println("Error in saving document");
}
}

//**Constructor wordCount.
int wordCount()
{
Doc newDoc=new Doc();
newDoc.text=text.trim();
if (newDoc.text.length()==0) {return 0;
}
newDoc.replace("\n"," ");
newDoc.replace("\t"," ");
int n=newDoc.specifiedWordCount(" ")-newDoc.specifiedWordCount(" ")+1;
return n;
}

int specifiedWordCount(String specifiedWord){return specifiedWordCount(specifiedWord,true);
}

int specifiedWordCount(String specifiedWord,boolean ignoreCase)
{
int n1=text.length();
int n2=specifiedWord.length();
String subs;
int n=0;
for (int i=0;i<=(n1-n2);i++)
{
subs=text.substring(i,i+n2);
if (ignoreCase)
{
if (subs.compareToIgnoreCase(specifiedWord)==0)
{
n++;
}
}
else
{
if (subs.compareTo(specifiedWord)==0)
{
n++;
}
}
}
return n;
}

//**Constructor replace.
void replace(String s1,String s2)
{
replace(s1,s2,true);
}

void replace(String s1,String s2,boolean ignoreCase)
{
int n1=s1.length();
int n2=s2.length();
String sub1,sub2;
String subs;
for (int i=0;i<=(text.length()-n1);i++)
{
subs=text.substring(i,i+n1);
if (ignoreCase)
{
if (subs.compareToIgnoreCase(s1)==0)
{
sub1=text.substring(0,i);
sub2=text.substring(i+n1,text.length());
text=sub1+s2+sub2;
}
}
else
{
if (subs.compareTo(s1)==0)
{
sub1=text.substring(0,i);
sub2=text.substring(i+n1,text.length());
text=sub1+s2+sub2;
}
}
}
}

//**Constructor encrypt.
void encrypt (String[] mSource,String[] mDestination)
{
int i;
for(i=0;i