How can I write jsp code called with buttons?

// Import the JAVA class package
Import java. awt .*;
Import java. awt. event .*;
Import javax. swing .*;
Import java. io .*;

Class EditFile
{
// Default constructor
EditFile (){}
// Save the file Function
Void SaveFile (String name, String str)
{
Try
{
// Declare the file output object
FileOutputStream fos = new FileOutputStream (name );
// Output and save the file
Fos. write (str. getBytes ());
}
Catch (IOException e)
{
// Print the error message when an error occurs
System. out. println (e. toString ());
}
}
// Open the file Function
String OpenFile (String name)
{
// Define the str string to save the file content
String str = null;
// Define the counter
Int ch = 0;
Try
{
// Declare the input object of the file
FileInputStream FCM = new FileInputStream (name );
// Traverse the input object and store the memory in str
While (ch = FCM. read ())! =-1)
{
Str = str + (char) ch;
}
// Close the object
FCM. close ();
}
Catch (IOException e)
{
// Print the error message when an error occurs
System. out. println (e. toString ());
}
// Return str
Return str;
}
}

Class MyMainFrame extends JFrame implements ActionListener
{
// File name
String filename = null;
// Search for strings
String findtxt = null;
// Replace the string
String replacetxt = null;
// Search Start bit
Int findtxton =-1;
// Find the digit
Int findtxtoff =-1;
// Intermediate plane
Container c = getContentPane ();
// Menu
JMenuBar mainMb = new JMenuBar ();
// Menu button
JMenu fileMenu = new JMenu ("file ");
JMenu editMenu = new JMenu ("edit ");
JMenu typeMenu = new JMenu ("format ");
JMenuItem newItem = new JMenuItem ("new ");
JMenuItem openItem = new JMenuItem ("open ");
JMenuItem saveItem = new JMenuItem ("save ");
JMenuItem saveasItem = new JMenuItem ("Save ");
JMenuItem exitItem = new JMenuItem ("quit ");
JMenuItem findItem = new JMenuItem ("Search ");
JMenuItem findnextItem = new JMenuItem ("find next ");
JMenuItem changeItem = new JMenuItem ("replace ");
JCheckBoxMenuItem changelineItem = new JCheckBoxMenuItem ("", false );
// Text field
JTextArea txt = new JTextArea ();
JTextArea txt2 = new JTextArea ();
// Scroll bar
JScrollPane jsp (preferred for SUN Enterprise applications );
// File operation object
EditFile ef = new EditFile ();
// Constructor
MyMainFrame ()
{
// Draw the interface
C. setLayout (new BorderLayout ());
Jsp (preferred for SUN Enterprise Applications) = new JScrollPane (txt );
Jsp (preferred for SUN Enterprise Applications). setHorizontalScrollBarPolicy (preferred for SUN Enterprise Applications). HORIZONTAL_SCROLLBAR_AS_NEEDED );
C. add (jsp (preferred for SUN Enterprise applications), BorderLayout. CENTER );
MainMb. add (fileMenu );
FileMenu. add (newItem );
FileMenu. add (openItem );
FileMenu. add (saveItem );
FileMenu. add (saveasItem );
FileMenu. addSeparator ();
FileMenu. add (exitItem );
MainMb. add (editMenu );
EditMenu. add (findItem );
EditMenu. add (findnextItem );
EditMenu. add (changeItem );
MainMb. add (typeMenu );
TypeMenu. add (changelineItem );
SetJMenuBar (mainMb );
// Add event listening for the menu
NewItem. addActionListener (this );
OpenItem. addActionListener (this );
SaveItem. addActionListener (this );
SaveasItem. addActionListener (this );
ExitItem. addActionListener (this );
FindItem. addActionListener (this );
FindnextItem. addActionListener (this );
ChangeItem. addActionListener (this );
ChangelineItem. addActionListener (this );
}
// Event processing functions
Public void actionreceivmed (ActionEvent e)
{
// Create a file operation object
EditFile ef = new EditFile ();
// If you click the button to create
If (e. getActionCommand () = "new ")
{
// Leave the text field empty
Txt. setText (null );
// The file name is empty.
Filename = null;
}
// If you click the button to open
If (e. getActionCommand () = "open ")
{
// Define a file form
FileDialog openDialog = new FileDialog (this, "open file...", FileDialog. LOAD );
// Display form
OpenDialog. show ();
// If the returned file is not empty
If (openDialog. getFile ()! = Null)
{
// Get the file name
Filename = openDialog. getFile ();
// Obtain the File Content
Txt. setText (ef. OpenFile (openDialog. getFile ()));
}
}
// If you click the Save button
If (e. getActionCommand () = "save ")
{
// If no file name exists
If (filename = null)
{
// Define a file form
FileDialog saveDialog = new FileDialog (this, "SAVE as...", FileDialog. SAVE );
// Display form
SaveDialog. show ();
// If the returned file is not empty
If (saveDialog. getFile ()! = Null)
{
// Get the file name
Filename = saveDialog. getFile ();
// Save the file
Ef. SaveFile (filename, txt. getText ());
}
}
Else
{
// Directly save the file
Ef. SaveFile (filename, txt. getText ());
}
}
// If you click the Save
If (e. getActionCommand () = "Save ")
{
// Define a file form
FileDialog saveDialog = new FileDialog (this, "SAVE as...", FileDialog. SAVE );
// Display form
SaveDialog. show ();
// If the returned file is not empty
If (saveDialog. getFile ()! = Null)
{
// Get the file name
Filename = saveDialog. getFile ();
// Save the file
Ef. SaveFile (filename, txt. getText ());
}
}
// If the button is pushed
If (e. getActionCommand () = "exit ")
{
// Exit
System. exit (0 );
}
// If you click the search button
If (e. getActionCommand () = "Search ")
{
// Define a dialog box
JOptionPane inputdia = new JOptionPane ();
// Get the search text in the definition dialog box
Findtxt = inputdia. showInputDialog ("Enter the text to search", null );
// Define the actual coordinates
Findtxton =-1;
Findtxtoff =-1;
// Call the lookup Function
Find ();
}
// If you click the button to find the next
If (e. getActionCommand () = "find next ")
{
// Call the lookup Function
Find ();
}
// If you click the button to replace
If (e. getActionCommand () = "replace ")
{
// Define a dialog box
JOptionPane inputdia = new JOptionPane ();
// Obtain the search and replace text
Findtxt = inputdia. showInputDialog ("Enter the text to be replaced", null );
Replacetxt = inputdia. showInputDialog ("Enter the replaced text", null );
// Backup content
Txt2.setText (replacetxt );
Txt2.selectAll ();
Txt2.copy ();
// Call the lookup Function
Find ();
// If not found
If (findtxton =-1 & findtxtoff =-1)
{
}
// If you find
Else
{
// Replace
Txt. paste ();
}
Findtxton =-1;
Findtxtoff =-1;
}
// If you click the button to wrap the line automatically
If (e. getActionCommand () = "")
{
// Judge the current status
If (changelineItem. isSelected () = true)
{
// Set the scroll bar status
Jsp (preferred for SUN Enterprise Applications). setHorizontalScrollBarPolicy (preferred for SUN Enterprise Applications). HORIZONTAL_SCROLLBAR_NEVER );
// Set whether to wrap the line.
Txt. setLineWrap (true );
}
Else
{
Jsp (preferred for SUN Enterprise Applications). setHorizontalScrollBarPolicy (preferred for SUN Enterprise Applications). HORIZONTAL_SCROLLBAR_AS_NEEDED );
Txt. setLineWrap (false );
}
}
}
// Query Functions
Public void find ()
{
// Define a temporary string
String tempstr;
// If the search text is not empty
If (findtxt! = Null)
{
Try
{
// Search
Tempstr = txt. getText (findtxton + 1, (txt. getText (). length ()-findtxton-1 ));
Findtxton = findtxton + 1 + tempstr. indexOf (findtxt );
}
Catch (Exception e)
{