Null pointer Exception using a PrintWriter - nullpointerexception

Question

I have that inner class shown under. This is for a client/server and I had nullpointer exception at the "println" from an PrintWriter. I have tried all I know to solve it but, unsuccessfully. Anyone can give me a tip or an idea for what I have to do. Thanks guys!
Here's the FULL CLASS code:
public class ChatClient extends JFrame{
private JTextField textToSend;
private Socket socket;
private PrintWriter writer
private String name;
private JTextArea receivedText;
private Scanner reader;
public ChatCliente(String name){
super("Chat: "+ name);
this.name = name;
Font font = new Font("Serif", Font.PLAIN, 20);
textToSend = new JTextField();
textToSend.setFont(font);
JButton btn = new JButton("Send");
btn.setFont(font);
btn.addActionListener(new Listener());
Container content = new JPanel();
content.setLayout(new BorderLayout());
content.add(BorderLayout.CENTER, textToSend);
content.add(BorderLayout.EAST, btn);
receivedText = new JTextArea();
receivedText.setFont(font);
JScrollPane scroll = new JScrollPane(receivedText);
getContentPane().add(BorderLayout.CENTER, scroll);
getContentPane().add(BorderLayout.SOUTH, content);
configureNetwork();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(500,500);
setVisible(true);
}
private void configureNetwork(){
try{
socket = new Socket("127.0.0.1",5000);
writer = new PrintWriter(socket.getOutputStream());
reader = new Scanner(socket.getInputStream());
new Thread(new ServerThread()).start();
}catch (Exception e){}
}
private class Listener implements ActionListener{
#Override
public void actionPerformed(ActionEvent e) {
try{
String s = name;
String t = textToSend.getText();
System.out.println(name+" : "+ textToSend.getText());
writer.println(s+" : "+t);
writer.flush();
textToSend.setText("");
textToSend.requestFocus();
}catch(Exception ex){
ex.printStackTrace();
}
}
}
private class ServerThread implements Runnable{
#Override
public void run() {
String text;
try{
while((text = reader.nextLine()) != null){
receivedText.append(text+"\n");
}
}catch(Exception e){}
}
}
}

Answer 1

'name' is not declared.
Maybe you meant:
String s = "name";

Answer 2

Just some stupid thing that happened to me: do not insert "/" in the name of your file, or it will of course look for an extra folder that probably isn't there.
int number = 1, total = 126;
String path = "some/path/found " + number + "/" + total;
PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(path, true)));