What is wrong with this program it keeps telling me the file doesn't exist?

Question

this program is supposed to write the file so why does it need the file to already exist?
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;
public class NewClass implements ActionListener{
    static List list = new List();
    static TextField input = new TextField(20);
    static Button submit = new Button("Submit");
    static Frame f = new Frame("RealmList editor");
    static File file = new File("/Applications/World of Warcraft/realmlist.wtf");
    static Label status = new Label("");
    static Button selected = new Button("Change to Selected");
    static File config = new File("/Applications/RealmLister/config.txt");
    static File dir = new File("/Applications/RealmLister/");
    public static void main(String[] args) {
        f.setLayout(new BorderLayout());
        f.add(list, BorderLayout.CENTER);
        Panel p = new Panel();
        p.add(input);
        p.add(submit);
        p.add(selected);
        f.add(p, BorderLayout.NORTH);
        f.add(status, BorderLayout.SOUTH);
        new NewClass();
        f.setSize(500,500);
        f.setVisible(true);
        try {
            loadConfig();
        } catch(Exception e) {}
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent we) {
                try {
                  writeConfig();
                  System.exit(0);
                } catch(Exception e) {
                   status.setText("Error: config couldn't be written!("+e+")");
    public NewClass() {
        submit.addActionListener(this);
        input.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if(e.getKeyCode() == KeyEvent.VK_ENTER) {
                try {
                editRealmlist(input.getText(), true);
                input.setText("");
             catch(Exception ex) {
               status.setText("Error: "+e);
        selected.addActionListener(this);
    public void actionPerformed(ActionEvent e) {
        if(e.getSource() == submit) {
            try {
                editRealmlist(input.getText(), true);
                input.setText("");
            } catch(Exception ex) {
               status.setText("Error: "+e);
               wait(3000);
               status.setText("");
        if(e.getSource() == selected) {
            try {
                editRealmlist(list.getSelectedItem(),false);
            } catch(Exception ex) {
                status.setText("Error: "+e);
                wait(3000);
                status.setText("");
    public static void loadConfig() throws Exception{
        if(config.exists()) {
            Scanner scan = new Scanner(config);
            ArrayList<String> al = new ArrayList<String>();
            while(scan.hasNext()) {
                al.add(scan.nextLine());
            for(int i = 0; i < al.size(); i++) {
                list.add(al.get(i));
    public static void writeConfig() throws Exception{
        FileWriter fw = new FileWriter(config);
        dir.mkdir();
        config.mkdirs();
        String temp = "";
        for(int i = 0; i < list.getItemCount(); i++) {
            temp += list.getItem(i)+"\n";
        fw.write(temp);
        fw.flush();
        System.gc();
    public static void editRealmlist(String realm, boolean addtoList) throws Exception{
        FileWriter fw = new FileWriter(file);
        fw.write("set realmlist "+realm+"\nset patchlist us.version.worldofwarcraft.com");
        fw.flush();
        status.setText("Editing RealmList.wtf Please Wait...");
        Thread.sleep(3000);
        status.setText("");
        System.gc();
        if(addtoList)
            list.add(realm);
    public void wait(int time) {
        try {
            Thread.sleep(time);
        catch(Exception e) {}
}

Answer 1

Erm, you should call mkdirs() on a File object that represents a directory.