How to make the program look like this? $($a$)$

$($b$)$ here is my code import javax.swing.$*$;

import java.awt.$*$;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io$.$IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

public class Main extends JFrame $\{$

private JTextField fileNameField;

private JTextArea binaryTextArea;

public Main$()\{$

setTitle$("$Binary Editor"$)$;

setSize$(400,300)$;

setDefaultCloseOperation$($JFrame$.$EXIT$\_$ON$\_$CLOSE$)$;

setLayout$($new BorderLayout$())$;

fileNameField $=$ new JTextField$()$;

binaryTextArea $=$ new JTextArea$()$;

binaryTextArea.setEditable$($true$)$;

JButton loadButton $=$ new JButton$("$Load$")$;

JButton saveButton $=$ new JButton$("$Save$")$;

loadButton.addActionListener$($new ActionListener$()\{$

@Override

public void actionPerformed$($ActionEvent e$)\{$

loadFile$()$;

$\}$

$\})$;

saveButton.addActionListener$($new ActionListener$()\{$

@Override

public void actionPerformed$($ActionEvent e$)\{$

saveFile$()$;

$\}$

$\})$;

JPanel topPanel $=$ new JPanel$($new FlowLayout$())$;

topPanel.add$($new JLabel$("$File Name:"$))$;

topPanel.add$($fileNameField$)$;

topPanel.add$($loadButton$)$;

topPanel.add$($saveButton$)$;

add$($topPanel$,$ BorderLayout.NORTH$)$;

add$($new JScrollPane$($binaryTextArea$),$ BorderLayout.CENTER$)$;

$\}$

private void loadFile$()\{$

String fileName $=$ fileNameField.getText$()$;

try $\{$

Path filePath $=$ Paths.get$($fileName$)$;

byte$[]$ fileBytes $=$ Files.readAllBytes$($filePath$)$;

String binaryRepresentation $=$ bytesToBinary$($fileBytes$)$;

binaryTextArea.setText$($binaryRepresentation$)$;

$\}$ catch $($IOException ex$)\{$

JOptionPane.showMessageDialog$($this$,$ "Error loading file: $"+$ ex$.$getMessage$(),$ "Error", JOptionPane.ERROR$\_$MESSAGE$)$;

$\}$

$\}$

private void saveFile$()\{$

String fileName $=$ fileNameField.getText$()$;

String binaryCode $=$ binaryTextArea.getText$()$;

try $\{$

byte$[]$ modifiedBytes $=$ binaryToBytes$($binaryCode$)$;

Path filePath $=$ Paths.get$($fileName$)$;

Files.write$($filePath$,$ modifiedBytes$)$;

JOptionPane.showMessageDialog$($this$,$ "File saved successfully!", "Success", JOptionPane.INFORMATION$\_$MESSAGE$)$;

$\}$ catch $($IOException ex$)\{$

JOptionPane.showMessageDialog$($this$,$ "Error saving file: $"+$ ex$.$getMessage$(),$ "Error", JOptionPane.ERROR$\_$MESSAGE$)$;

$\}$

$\}$

private String bytesToBinary$($byte$[]$ bytes$)\{$

StringBuilder binaryStringBuilder $=$ new StringBuilder$()$;

for $($byte b : bytes$)\{$

binaryStringBuilder.append$($String$.$format$("\%8$s$",$ Integer.toBinaryString$($b & $0$xFF$)).$replace$(\text{'}\text{'},\text{'}0\text{'}))$;

$\}$

return binaryStringBuilder.toString$()$;

$\}$

private byte$[]$ binaryToBytes$($String binary$)\{$

int length $=$ binary.length$()$;

byte$[]$ result $=$ new byte$[$length $/8]$;

for $($int i $=0$; i $$ length; i $+=8)\{$

String byteStr $=$ binary.substring$($i$,$ i $+8)$;

result$[$i $/8]=($byte$)$ Integer.parseInt$($byteStr$,2)$;

$\}$

return result;

$\}$

public static void main$($String$[]$ args$)\{$

SwingUtilities.invokeLater$($new Runnable$()\{$

@Override

public void run$()\{$

new Main$().$setVisible$($true$)$;

$\}$

$\})$;

$\}$

$\}$