the code does not run in eclipse can you fix it

import javax.swing.$*$;

import java.awt.$*$;

import java.awt.event.$*$;

import java.util.Collections;

import java.util.LinkedList;

import java.util.List;

public class NumberListApp extends JFrame $\{$

private JTextField numberInput $=$ new JTextField$(10)$;

private JTextArea displayArea $=$ new JTextArea$(10,30)$;

private List numberList $=$ new LinkedList$<>()$;

public NumberListApp$()\{$

setTitle$("$Number List App"$)$;

setLayout$($new FlowLayout$())$;

JButton addButton $=$ new JButton$("$Add$")$;

JButton sortButton $=$ new JButton$("$Sort$")$;

JButton shuffleButton $=$ new JButton$("$Shuffle$")$;

JButton reverseButton $=$ new JButton$("$Reverse$")$;

add$($new JLabel$("$Enter a number:"$))$;

add$($numberInput$)$;

add$($addButton$)$;

add$($sortButton$)$;

add$($shuffleButton$)$;

add$($reverseButton$)$;

add$($new JScrollPane$($displayArea$))$;

addButton.addActionListener$($e $->$ addNumber$())$;

sortButton.addActionListener$($e $->$ sortNumbers$())$;

shuffleButton.addActionListener$($e $->$ shuffleNumbers$())$;

reverseButton.addActionListener$($e $->$ reverseNumbers$())$;

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

setSize$(400,300)$;

setVisible$($true$)$;

$\}$

private void addNumber$()\{$

try $\{$

int number $=$ Integer.parseInt$($numberInput$.$getText$())$;

numberList.add$($number$)$;

displayNumbers$()$;

numberInput.setText$("")$;

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

JOptionPane.showMessageDialog$($this$,$ "Please enter a valid integer."$)$;

$\}$

$\}$

private void sortNumbers$()\{$

Collections.sort$($numberList$)$;

displayNumbers$()$;

$\}$

private void shuffleNumbers$()\{$

Collections.shuffle$($numberList$)$;

displayNumbers$()$;

$\}$

private void reverseNumbers$()\{$

Collections.reverse$($numberList$)$;

displayNumbers$()$;

$\}$

private void displayNumbers$()\{$

displayArea.setText$("")$;

for $($int number : numberList$)\{$

displayArea.append$($number $+"$

$")$;

$\}$

$\}$

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

SwingUtilities.invokeLater$($NumberListApp::new$)$;

$\}$

$\}$