choosing a txt file with JFileChooser and making it appear on a JTextField just wont work

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this is the codes when i press open another Window appears with JFileChooser to select the file again and when i try to select the file again it just gives me "open command canceled by user" message and the program stop working and ends with an unknown exception

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.filechooser.FileNameExtensionFilter;


public class FileC extends JFrame {
File file;
JFileChooser chooser = new JFileChooser();
JTextArea TArea = new JTextArea();
public FileC()
{
    super.setLayout(new FlowLayout());
    super.add(chooser);
    super.add(TArea);
    FileNameExtensionFilter filter = new FileNameExtensionFilter ( "text files " , "txt");
    chooser.setFileFilter(filter);
    ActionHandler handler = new ActionHandler ();
    chooser.addActionListener(handler);
}

private class ActionHandler implements ActionListener
{

    public void actionPerformed(ActionEvent e) {
        int returnVal = chooser.showOpenDialog(FileC.this);
        if (returnVal == JFileChooser.APPROVE_OPTION) {
            file = chooser.getSelectedFile();
        } else {
            JOptionPane.showMessageDialog(null,"Open command cancelled by user.");
        }
        try {
            BufferedReader in = new BufferedReader ( new FileReader (file));
            String s = in.readLine();
            while (s != null)
            {
                TArea.append(s);
                s = in.readLine();
            }

        }catch (FileNotFoundException z){ JOptionPane.showMessageDialog(null, "file not found");  }
        catch (IOException z) { z.printStackTrace();  }
        }
}   

}

asked 1 min ago

user3469432

1