Source code for notepad in java?

Answer 1

import java.awt.*;

import java.awt.event.*;

import java.awt.datatransfer.*;

import java.io.*;

public class Editor extends Frame

{

String filename;

TextArea tx;

Clipboard clip = getToolkit().getSystemClipboard();

Editor()

{

setLayout(new GridLayout(1,1));

tx = new TextArea();

add(tx);

MenuBar mb = new MenuBar();

Menu F = new Menu("file");

MenuItem n = new MenuItem("New");

MenuItem o = new MenuItem("Open");

MenuItem s = new MenuItem("Save");

MenuItem e = new MenuItem("Exit");

n.addActionListener(new New());

F.add(n);

o.addActionListener(new Open());

F.add(o);

s.addActionListener(new Save());

F.add(s);

e.addActionListener(new Exit());

F.add(e);

mb.add(F);

Menu E = new Menu("Edit");

MenuItem cut = new MenuItem("Cut");

MenuItem copy = new MenuItem("Copy");

MenuItem paste = new MenuItem("Paste");

cut.addActionListener(new Cut());

E.add(cut);

copy.addActionListener(new Copy());

E.add(copy);

paste.addActionListener(new Paste());

E.add(paste);

mb.add(E);

setMenuBar(mb);

mylistener mylist = new mylistener();

addWindowListener(mylist);

}

class mylistener extends WindowAdapter

{

public void windowClosing (WindowEvent e)

{

System.exit(0);

}

}

class New implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

tx.setText(" ");

setTitle(filename);

}

}

class Open implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

FileDialog fd = new FileDialog(Editor.this, "select File",FileDialog.LOAD);

fd.show();

if (fd.getFile()!=null)

{

filename = fd.getDirectory() + fd.getFile();

setTitle(filename);

ReadFile();

}

tx.requestFocus();

}

}

class Save implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

FileDialog fd = new FileDialog(Editor.this,"Save File",FileDialog.SAVE);

fd.show();

if (fd.getFile()!=null)

{

filename = fd.getDirectory() + fd.getFile();

setTitle(filename);

try

{

DataOutputStream d = new DataOutputStream(new FileOutputStream(filename));

String line = tx.getText();

BufferedReader br = new BufferedReader(new StringReader(line));

while((line = br.readLine())!=null)

{

d.writeBytes(line + "\r\n");

d.close();

}

}

catch(Exception ex)

{

System.out.println("File not found");

}

tx.requestFocus();

}

}

}

class Exit implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

System.exit(0);

}

}

void ReadFile()

{

BufferedReader d;

StringBuffer sb = new StringBuffer();

try

{

d = new BufferedReader(new FileReader(filename));

String line;

while((line=d.readLine())!=null)

sb.append(line + "\n");

tx.setText(sb.toString());

d.close();

}

catch(FileNotFoundException fe)

{

System.out.println("File not Found");

}

catch(IOException ioe){}

}

class Cut implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

String sel = tx.getSelectedText();

StringSelection ss = new StringSelection(sel);

clip.setContents(ss,ss);

tx.replaceRange(" ",tx.getSelectionStart(),tx.getSelectionEnd());

}

}

class Copy implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

String sel = tx.getSelectedText();

StringSelection clipString = new StringSelection(sel);

clip.setContents(clipString,clipString);

}

}

class Paste implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

Transferable cliptran = clip.getContents(Editor.this);

try

{

String sel = (String) cliptran.getTransferData(DataFlavor.stringFlavor);

tx.replaceRange(sel,tx.getSelectionStart(),tx.getSelectionEnd());

}

catch(Exception exc)

{

System.out.println("not string flavour");

}

}

}

public static void main(String args[])

{

Frame f = new Editor();

f.setSize(500,400);

f.setVisible(true);

f.show();

}

}

Answer 2

Yes. You can use any text editor, compile with the javaccommand, and then run normally with the java command. However, it is better to use a decent IDE - it saves you a lot of work.

Yes. You can use any text editor, compile with the javaccommand, and then run normally with the java command. However, it is better to use a decent IDE - it saves you a lot of work.

Yes. You can use any text editor, compile with the javaccommand, and then run normally with the java command. However, it is better to use a decent IDE - it saves you a lot of work.

Yes. You can use any text editor, compile with the javaccommand, and then run normally with the java command. However, it is better to use a decent IDE - it saves you a lot of work.

Answer 3

Yes. You can use any text editor, compile with the javaccommand, and then run normally with the java command. However, it is better to use a decent IDE - it saves you a lot of work.