This is a simple text editor application.
Summary:
To create a simple text editor in Java, we have used a JFrame with a JPanel which contains a MenuBar and a TextArea. Then we have added Menus to the MenuBar and MenuItems to the Menus. In Format Menu, we have used 3 sub-Menus. All the MenuItems have ActionListeners to detect any action. We have used FileWriter and FileReader to write and read data in text (.txt) files.
The Menu Bar contains 4 menus:
File : New – creates new file, Open – opens existing file, Save As – saves the file, Exit – closes the application.
Edit : Cut – cuts selected text, Copy – copies selected text, Paste – pastes text from clipboard, Delete – deletes selected text, Select All –selects the entire text, Time/Date – displays time and date.
Format : Font – submenu (Courier, Helvetica, Monospaced, Serif, SansSerif, TimesRoman), Font Style – submenu (Regular, Bold, Italic, Bold Italic), Size – submenu (8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72).
About : About TextEditor – displays information about the application.
Methods used:
| METHOD | EXPLANATION |
| TextEditor (String) | constructor to create the text editor |
| ActionPerformed (ActionEvent) | action listeners for all menu items |
| main() | main method (executable) |
Program:
//TextEditor - VoidCode
//Website - https://void.code.blog/
import java.awt.*;
import java.awt.print.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class TextEditor extends JFrame implements ActionListener
{
MenuBar mbar;
Menu file,edit,format,about,font,font1,font2;
MenuItem item1,item2,item3,item4;
MenuItem item5,item6,item7,item8,item9,item10;
MenuItem item11;
MenuItem fname1,fname2,fname3,fname4,fname5,fname6;
MenuItem fstyle1,fstyle2,fstyle3,fstyle4;
MenuItem fsize1,fsize2,fsize3,fsize4,fsize5,fsize6,fsize7,fsize8,fsize9,fsize10,fsize11,fsize12,fsize13,fsize14;
JPanel mainpanel;
TextArea text;
Font f;
String months[]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
GregorianCalendar gcalendar;
String command=" ";
String str=" ",str1=" ",str2=" ",str3=" ",str4=" ",str6=" ",str7=" ",str8=" ",str9=" ",str10=" ";
int len1,i=0,pos1,len;
public TextEditor(String str)
{
super(str);
mainpanel=new JPanel();
mainpanel=(JPanel)getContentPane();
mainpanel.setLayout(new FlowLayout());
mbar=new MenuBar();
setMenuBar(mbar);
file=new Menu("File");
edit=new Menu("Edit");
format=new Menu("Format");
about=new Menu("About");
font=new Menu("Font");
font1=new Menu("Font Style");
font2=new Menu("Size");
file.add(item1=new MenuItem("New..."));
file.add(item2=new MenuItem("Open..."));
file.add(item3=new MenuItem("Save As..."));
file.add(item4=new MenuItem("Exit"));
mbar.add(file);
edit.add(item5=new MenuItem("Cut (Ctrl+X)"));
edit.add(item6=new MenuItem("Copy (Ctrl+C)"));
edit.add(item7=new MenuItem("Paste (Ctrl+V)"));
edit.add(item8=new MenuItem("Delete"));
edit.add(item9=new MenuItem("Select All (Ctrl+A)"));
edit.add(item10=new MenuItem("Time/Date"));
mbar.add(edit);
format.add(font);
format.add(font1);
format.add(font2);
font.add(fname1=new MenuItem("Courier"));
font.add(fname2=new MenuItem("Helvetica"));
font.add(fname3=new MenuItem("Monospaced"));
font.add(fname4=new MenuItem("Serif"));
font.add(fname5=new MenuItem("SansSerif"));
font.add(fname6=new MenuItem("TimesRoman"));
font1.add(fstyle1=new MenuItem("Regular"));
font1.add(fstyle2=new MenuItem("Bold"));
font1.add(fstyle3=new MenuItem("Italic"));
font1.add(fstyle4=new MenuItem("Bold Italic"));
font2.add(fsize1=new MenuItem("8"));
font2.add(fsize2=new MenuItem("10"));
font2.add(fsize3=new MenuItem("12"));
font2.add(fsize4=new MenuItem("14"));
font2.add(fsize5=new MenuItem("16"));
font2.add(fsize6=new MenuItem("18"));
font2.add(fsize7=new MenuItem("20"));
font2.add(fsize8=new MenuItem("22"));
font2.add(fsize9=new MenuItem("24"));
font2.add(fsize10=new MenuItem("26"));
font2.add(fsize11=new MenuItem("28"));
font2.add(fsize12=new MenuItem("36"));
font2.add(fsize13=new MenuItem("48"));
font2.add(fsize14=new MenuItem("72"));
mbar.add(format);
about.add(item11=new MenuItem("About TextEditor"));
mbar.add(about);
item1.addActionListener(this);
item2.addActionListener(this);
item3.addActionListener(this);
item4.addActionListener(this);
item5.addActionListener(this);
item6.addActionListener(this);
item7.addActionListener(this);
item8.addActionListener(this);
item9.addActionListener(this);
item10.addActionListener(this);
item11.addActionListener(this);
fname1.addActionListener(this);
fname2.addActionListener(this);
fname3.addActionListener(this);
fname4.addActionListener(this);
fname5.addActionListener(this);
fname6.addActionListener(this);
fstyle1.addActionListener(this);
fstyle2.addActionListener(this);
fstyle3.addActionListener(this);
fstyle4.addActionListener(this);
fsize1.addActionListener(this);
fsize2.addActionListener(this);
fsize3.addActionListener(this);
fsize4.addActionListener(this);
fsize5.addActionListener(this);
fsize6.addActionListener(this);
fsize7.addActionListener(this);
fsize8.addActionListener(this);
fsize9.addActionListener(this);
fsize10.addActionListener(this);
fsize11.addActionListener(this);
fsize12.addActionListener(this);
fsize13.addActionListener(this);
fsize14.addActionListener(this);
text=new TextArea(27,90);
mainpanel.add(text);
f=new Font("Monotype Corsiva",Font.PLAIN,15);
text.setFont(f);
this.setTitle("Untitled-TextEditor");
}
public void actionPerformed(ActionEvent ae)
{
command=(String)ae.getActionCommand();
if(command.equals("New..."))
{
dispose();
TextEditor note1 = new TextEditor("Untitled-TextEditor");
note1.setSize(765,550);
note1.setVisible(true);
this.setTitle("Untitled-TextEditor");
}
try
{
if(command.equals("Open..."))
{
str4=" ";
FileDialog dialog=new FileDialog(this,"Open");
dialog.setVisible(true);
str1=dialog.getDirectory();
str2=dialog.getFile();
str3=str1+str2;
File f=new File(str3);
FileInputStream fobj=new FileInputStream(f);
len=(int)f.length();
for(int j=0;j<len;j++)
{
char str5=(char)fobj.read();
str4=str4 + str5;
}
fobj.close();
text.setText(str4);
}
this.setTitle(str2);
}
catch(IOException e){}
try
{
if(command.equals("Save As..."))
{
FileDialog dialog1=new FileDialog(this,"Save As",FileDialog.SAVE);
dialog1.setVisible(true);
str7=dialog1.getDirectory();
str8=dialog1.getFile();
str9=str7+str8;
str6=text.getText();
len1=str6.length();
byte buf[]=str6.getBytes();
File f1=new File(str9+".txt");
FileOutputStream fobj1=new FileOutputStream(f1);
for(int k=0;k<len1;k++)
{
fobj1.write(buf[k]);
}
fobj1.close();
}
this.setTitle(str8);
}
catch(IOException e){}
try
{
if(command.equals(" Save "))
{
FileDialog dialog1=new FileDialog(this,"Save As",FileDialog.SAVE);
dialog1.setVisible(true);
str7=dialog1.getDirectory();
str8=dialog1.getFile();
str9=str7+str8;
str6=text.getText();
len1=str6.length();
byte buf[]=str6.getBytes();
File f1=new File(str9+".txt");
FileOutputStream fobj1=new FileOutputStream(f1);
for(int k=0;k<len1;k++)
{
fobj1.write(buf[k]);
}
fobj1.close();
}
this.setTitle(str8);
}
catch(IOException e){}
if(command.equals("Exit"))
{
str10=(str8.equals(" "))?"":("to "+str8+" ");
JFrame frameExit = new JFrame("Do you want to save changes "+str10+"?");
frameExit.setSize(400,160);
frameExit.setVisible(true);
JPanel panelE = new JPanel();
frameExit.add(panelE);
panelE.setLayout(new GridLayout(7,3));
JLabel label1E = new JLabel("");
JLabel label2E = new JLabel("");
JLabel label3E = new JLabel("");
JLabel labelL1 = new JLabel("");
JLabel labelL2 = new JLabel("");
JLabel labelL3 = new JLabel("");
JLabel labelL4 = new JLabel("");
JLabel labelL5 = new JLabel("");
JLabel labelR1 = new JLabel("");
JLabel labelR2 = new JLabel("");
JLabel labelR3 = new JLabel("");
JLabel labelR4 = new JLabel("");
JLabel labelR5 = new JLabel("");
JButton button1 = new JButton(" Save ");
JButton button2 = new JButton("Don't Save");
panelE.add(labelL1);
panelE.add(label1E);
panelE.add(labelR1);
panelE.add(labelL2);
panelE.add(button1);
panelE.add(labelR2);
panelE.add(labelL3);
panelE.add(label2E);
panelE.add(labelR3);
panelE.add(labelL4);
panelE.add(button2);
panelE.add(labelR4);
panelE.add(labelL5);
panelE.add(label3E);
panelE.add(labelR5);
button1.addActionListener (this);
button2.addActionListener (this);
}
if(command.equals("Don't Save"))
{
System.exit(0);
}
if(command.equals("Cut (Ctrl+X)"))
{
str=text.getSelectedText();
i=text.getText().indexOf(str);
text.replaceRange(" ",i,i+str.length());
}
if(command.equals("Copy (Ctrl+C)"))
{
str=text.getSelectedText();
}
if(command.equals("Paste (Ctrl+V)"))
{
pos1=text.getCaretPosition();
text.insert(str,pos1);
}
if(command.equals("Delete"))
{
String msg=text.getSelectedText();
i=text.getText().indexOf(msg);
text.replaceRange("",i,i+msg.length());
}
if(command.equals("Time/Date"))
{
gcalendar=new GregorianCalendar();
String h=String.valueOf(gcalendar.get(Calendar.HOUR));
String m=String.valueOf(gcalendar.get(Calendar.MINUTE));
String s=String.valueOf(gcalendar.get(Calendar.SECOND));
String date=String.valueOf(gcalendar.get(Calendar.DATE));
String mon=months[gcalendar.get(Calendar.MONTH)];
String year=String.valueOf(gcalendar.get(Calendar.YEAR));
String hms="Time"+" - "+h+":"+m+":"+s+" Date"+" - "+date+" "+mon+" "+year;
int loc=text.getCaretPosition();
text.insert(hms,loc);
}
if(command.equals("Courier"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font("Courier",fontStyle,fontSize);
text.setFont(f);
}
if(command.equals("Helvetica"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font("Helvetica",fontStyle,fontSize);
text.setFont(f);
}
if(command.equals("Monospaced"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font("Monospaced",fontStyle,fontSize);
text.setFont(f);
}
if(command.equals("Serif"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font("Serif",fontStyle,fontSize);
text.setFont(f);
}
if(command.equals("SansSerif"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font("SansSerif",fontStyle,fontSize);
text.setFont(f);
}
if(command.equals("TimesRoman"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font("TimesRoman",fontStyle,fontSize);
text.setFont(f);
}
if(command.equals("Regular"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,Font.PLAIN,fontSize);
text.setFont(f);
}
if(command.equals("Bold"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,Font.BOLD,fontSize);
text.setFont(f);
}
if(command.equals("Italic"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,Font.ITALIC,fontSize);
text.setFont(f);
}
if(command.equals("Bold Italic"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,Font.BOLD|Font.ITALIC,fontSize);
text.setFont(f);
}
if(command.equals("8"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,8);
text.setFont(f);
}
if(command.equals("10"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,10);
text.setFont(f);
}
if(command.equals("12"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,12);
text.setFont(f);
}
if(command.equals("14"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,14);
text.setFont(f);
}
if(command.equals("16"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,16);
text.setFont(f);
}
if(command.equals("18"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,18);
text.setFont(f);
}
if(command.equals("20"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,20);
text.setFont(f);
}
if(command.equals("22"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,22);
text.setFont(f);
}
if(command.equals("24"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,24);
text.setFont(f);
}
if(command.equals("26"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,26);
text.setFont(f);
}
if(command.equals("28"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,28);
text.setFont(f);
}
if(command.equals("36"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,36);
text.setFont(f);
}
if(command.equals("48"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,48);
text.setFont(f);
}
if(command.equals("72"))
{
String fontName=f.getName();
String fontFamily=f.getFamily();
int fontSize=f.getSize();
int fontStyle=f.getStyle();
f=new Font(fontName,fontStyle,72);
text.setFont(f);
}
if(command.equals("Select All (Ctrl+A)"))
{
String strText=text.getText();
int strLen=strText.length();
text.select(0,strLen);
}
if(command.equals("About TextEditor"))
{
JFrame frameAbout = new JFrame("About TextEditor");
frameAbout.setSize(400,260);
frameAbout.setVisible(true);
JPanel panel = new JPanel();
frameAbout.add(panel);
panel.setLayout(new GridLayout(10,1));
JLabel label1 = new JLabel("");
JLabel label2 = new JLabel("");
JLabel label3 = new JLabel("");
JLabel label4 = new JLabel("");
JLabel label5 = new JLabel(" TextEditor");
JLabel label6 = new JLabel(" Version 1.0");
JLabel label7 = new JLabel("");
JLabel label8 = new JLabel(" This application has been developed by VoidCode.");
JLabel label9 = new JLabel(" All rights reserved.");
JLabel label10 = new JLabel("");
panel.add(label1);
panel.add(label2);
panel.add(label3);
panel.add(label4);
panel.add(label5);
panel.add(label6);
panel.add(label7);
panel.add(label8);
panel.add(label9);
panel.add(label10);
}
}
public static void main(String args[])
{
TextEditor note = new TextEditor("Untitled-TextEditor");
note.setSize(765,550);
note.setVisible(true);
}
}
Output:
Advice:
You can copy the above program and paste it in any offline compiler (eg. BlueJ). To make a .jar file, create this class in a new project and convert it to .jar file. The .jar file can be converted to a .exe (windows executable) file using any suitable wrapper application (eg. Launch4J). Don’t forget to add an iconic logo.
Here are a few logos to try. Convert the .jpg file to .ico using any online converter before wrapping the .jar file to .exe file.
NOTE : In the next update, we may add some more features to the text editor, such as, Page Setup, Print, Undo, Replace, Go To, Word Wrap, Status Bar & Help options (In this version, the Undo feature is available as keyboard shortcut Ctrl+Z).
Hope this helps. Team Void Code 🙂
void.code.blog 