Java Swing button freezes program
<p>I wrote a simple application in Swing that writes text to a file. Here is my main class:</p>

<pre><code>import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class WritingTextToFileApp {

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            JFrame frame = new MainFrame("Application");

            frame.setSize(500, 400);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
            }
        });

    }
}
</code></pre>

<p>Here is the other class:</p>

<pre><code>import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextArea;

public class MainFrame extends JFrame {

public MainFrame(String title) {
    super(title);
    //Set Layout Manager
    setLayout(new BorderLayout());
    //Create Swing Components
    JTextArea textArea = new JTextArea();
    JButton button = new JButton("Add");
    button.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            Scanner scanner = new Scanner(System.in);
            String input = scanner.nextLine();
             File file = new File("C:\\Users\\Vincent Wen\\Desktop\\Test.txt");
            try (BufferedWriter br = new BufferedWriter(new FileWriter(file))) {
                br.write(input);
                br.newLine();
            } catch (IOException ex) {
                System.out.println("Unable to write to file:" + file.toString());
            }
        }

    });
    //Add Swing components to conent pane
    Container c = getContentPane();
    c.add(textArea, BorderLayout.CENTER);
    c.add(button, BorderLayout.SOUTH);
}
</code></pre>

<p>}</p>

<p>Whenever I press the button, the program freezes and nothing happens. Is there something wrong with the code? I am new to Swing so any help would be appreciated.</p>