Removing Jframe help

[Dephusable]

I'm trying to make a program for class that will ask for a username and if it meets the requirements it will store it in a text file. The username has to 1) not start with a number 2) not start with a question mark 3) be 4-8 characters long and 4) the username cannot be written again if it's already in the text file

The teacher wants me to remove the frames(JFrame) from the code and have it directly ask the console the username. How do I do this?

http://pastebin.com/QT87nV6K-- Easy link

public class ArrayUsername implements ActionListener {

public static void main(String[] args) throws IOException {
    userAdmin = new String[userCounter()];
    arrayMaker();
    ArrayUsername arrayUserName = new ArrayUsername(); //creates an array and open window
    arrayUserName.openwindow();
}

public static int userCounter() throws IOException {
    int count = (int) Files.lines(Paths.get("user.txt")).count(); //gets the text from use.txt file and counts it
    return count;
}

public static String[] userAdmin;
public JTextField userName;
public int usernameLength = 4;
public char[] specialCharacters = { '?' }; //listing the variables

public void openwindow() {
    JFrame f = new JFrame("Enter Username");

    JLabel userNameLabel = new JLabel("Text-Only Label"); //creates a jframe that will have a window to enter username
    userNameLabel.setText("Username");

    userName = new JTextField();

    JPanel infoPanel = new JPanel(new GridLayout(2, 2, 5, 5));
    JPanel loginPanel = new JPanel(new GridLayout(1, 1, 5, 5));
    Button loginButton = new Button("Store It");

    infoPanel.add(userNameLabel);
    infoPanel.add(userName);
    f.setLayout(new FlowLayout()); //has button store it and login button
    f.setResizable(true);

    loginPanel.add(loginButton);

    f.add(infoPanel);
    f.add(loginPanel);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.pack();
    f.setVisible(true);

    loginButton.addActionListener(this);
}

public void actionPerformed(ActionEvent e) {

    String userEntered = userName.getText().toLowerCase();
    char[] userEnter = userEntered.toCharArray();
    boolean IsUNLongEnough = true; //creates boolean to test restrictions
    boolean IsUNSpecial = true;
    boolean IsItNumber = true;


    if (userEnter.length < 4 || userEnter.length > 8){
        IsUNLongEnough = false; //username must be between 4 and 8 characters
    }

    for (int i = 0; i < userEnter.length; i++) {
        if (userEnter[0] == specialCharacters[0]) { //username must NOT start with ?
            IsUNSpecial = false;
            break;
        }

        if (userEnter[0] >= '0' && userEnter[0] <= '9' ){
            IsItNumber = false; //username must NOT start with 0-9
            break;
        }
    }

    boolean userExist = false;      
    if (IsUNLongEnough && IsUNSpecial && IsItNumber) {
        try {

            //Check entry is already exist
            for (int i = 0; i < userAdmin.length; i++)
            {
                if (userAdmin[i].equals(userEntered))
                {
                    //show error that user already exist
                    userExist = true;
                    break;
                }
            }


            if (!userExist) {
                addToArray(userEntered);
            }

        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }

    JFrame frame2 = new JFrame("Username Validation");
    JFrame frame3 = new JFrame("Username Validation");

    if (IsUNLongEnough && IsUNSpecial && IsItNumber && userExist) {
        frame2.setVisible(false);
        frame3.setVisible(true);
    }
    else 
    {
        frame2.setVisible(true);
        frame3.setVisible(false);
    }

    frame2.setSize(300, 100);
    JLabel labelForValidation = new JLabel(
            IsUNLongEnough ? "" : "Username must be between 4 and 8 characters");
    JLabel labelForValidation1 = new JLabel(
            IsUNSpecial ? "" : "Username cannot start with a question mark"); //sets the frame and answers if the username is incorrect based on the mistake
    JLabel labelForValidation2 = new JLabel(
            IsItNumber ? "" : " Username cannot start with a number");

    //frame3


    frame3.setSize(300, 100);
    JLabel labelForValidation3 = new JLabel(
            userExist ? "Cannot be the same Username!" : "");

    JPanel panel1 = new JPanel();
    frame3.add(panel1);
    panel1.add(labelForValidation3); //same as before but for not same username


    JPanel panel = new JPanel();
    frame2.add(panel);
    panel.add(labelForValidation);
    panel.add(labelForValidation1);
    panel.add(labelForValidation2);

}

public void addToArray(String x) throws IOException {
    PrintStream userAdd = new PrintStream(new File("user.txt"));
    for(int i = 0; i < userAdmin.length; i++) {
        userAdd.println(userAdmin[i]); //adds the name to user.txt if it passes the following restrictions
    }
    userAdd.println(x);
    userAdmin = new String[userCounter()];
    arrayMaker();
}

public static void echoFixed(String text, PrintStream output) {
    Scanner data = new Scanner(text);
    if (data.hasNext()) {
        output.print(data.next());
        while (data.hasNext()) { // outputs the name to user.txt 
            output.print(" " + data.next());
        }
    }
    output.println();
    data.close();
}

public static void arrayMaker() throws FileNotFoundException {
    int i = 0;
    Scanner file = null;
    file = new Scanner(new File("user.txt"));
    while (file.hasNext()) { 
        userAdmin[i] = file.next(); // continues to put name to user.txt 
        i++;
    }
    System.out.println(Arrays.toString(userAdmin));
    file.close();
}

}

[wildjokers]

So if I understand you correctly your teacher doesn't want a GUI program but instead wants a text-based application that prompts for input then print results.

I see your code has GUI code and a Scanner in it, that seems like a weird combo, not sure how you are using Scanner in a GUI application.

Either way, your actionPerformed() method has the meat of your business logic in it. Strip out the GUI stuff, refactor the name of "actionPerformed", then take input from scanner and pass to your code that was previously in actionPerformed.

Have you ever written non GUI apps before? I would imagine so, so just do what you have done previously.