Question

in java plz and not using bufferedreader or bufferedwriter!!

Write an application that implements a simple text editor. Use a text field and a button to get the file. Read the entire file as characters and display it in a TextArea. The user will then be able to make changes in the text area. Use a Save button to get the contents of the text area and write that over the text in the original file.

Hint: Read each line from the file and then display the line in the text area using a method, maybe called appendText(aString). A method, maybe called getText, will return all of the text area in a string that then can be written to the file.

Answer 1

Please find the code below:

SimpleTextEditor.java

package graphichal;

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class SimpleTextEditor{

   SimpleTextEditor(){
       //main class
       final JFrame f=new JFrame(); //we are using jframe
       f.setPreferredSize(new Dimension(600,900));
       f.setLayout(null);

       final JTextField filename=new JTextField();
       filename.setBounds(0, 0, 270,30);
       f.add(filename);

       JButton openfile=new JButton("open file");
       openfile.setBounds(300, 0, 270,30);
       f.add(openfile);

       final JTextArea display=new JTextArea();
       display.setBounds(50, 50, 400,700);
       f.add(display);

       openfile.addActionListener(new ActionListener() {
           @Override
           public void actionPerformed(ActionEvent arg0) {
               Scanner sc = new Scanner(System.in);
               File file = new File(filename.getText()); //reading data from this file
               Scanner reader;
               String line="";
               try {
                   reader = new Scanner(file);
                   while(reader.hasNextLine()){
                       line += reader.nextLine()+"\n";
                   }
                   JOptionPane.showMessageDialog(null, "File loaded successfully");
                   display.setText(line);
               } catch (FileNotFoundException e) {
                   JOptionPane.showMessageDialog(null, "file not found");
               }
               sc.close();

           }
       });

       JButton save=new JButton("save");
       save.setBounds(100, 750, 270,30);
       f.add(save);

       save.addActionListener(new ActionListener() {
           @Override
           public void actionPerformed(ActionEvent arg0) {
               try {
                   PrintWriter outputFile = new PrintWriter(filename.getText());
                   outputFile.write(display.getText());
                   outputFile.close();
                   JOptionPane.showMessageDialog(null, "File saved successfully");
               } catch (FileNotFoundException e) {
                   JOptionPane.showMessageDialog(null, "file not found");
               }
           }
       });

       f.pack();
       f.setVisible(true);
   }

   public static void main(String[] args){
       SimpleTextEditor f = new SimpleTextEditor();

   }
}

output:

test.txt

at
ordeals
abcdefghijklmnopqrstuvwxyz
abcdefghijklmabcdefghijklm
abcdABCDabcd
sadf
dsafdsa
fds
fsd

asdf
asdf
asdf
asdfsadfadsfsadfasdfasd
f

sadf
sad

asdffffffffffffffffffffffffffffffffffffffffffferfdsaafedf