public boolean isCustomer(){
    boolean isFound = false;
    String record = null;
    FileReader in = null;
    try{
        in = new FileReader ("login.txt");
        BufferedReader bin = new BufferedReader(in);
        record = new String();
        while ((record = bin.readLine()) != null)
        {
            if (NameTextField.getText().contentEquals(record))
                isFound = true;
            if (jPasswordField.getText().contentEquals(record))
                isFound = true;
        }

    bin.close();
    bin = null;
}catch(IOException ioe){
    NameTextField.setText("IOProblem");
}
return isFound;

Joe

656451asda

$$$

Robert

123456hbb

$$$

Tracey

56464999abc

$$$

Celia

abc1234897

$$$

private String getUsername(String filename) {
    // 1. Open up the file.
    // 2. Return the String.
}

private String getPassword(String filename) {
    // Basically the same, but return the password.
}

String username = getUsername(filename);
String password = getPassword(filename);
return (username != null) && (password != null); // makes sure they're both there.

if (NameTextField.getText().contentEquals(record))
    isFound = true;
if (jPasswordField.getText().contentEquals(record))
    isFound = true;

if (foundUser && jPasswordField.getText().contentEquals(record)) {
    foundPassword = true;
    break; // No need to compare any more details...
} else {
    foundUser = false;
}
if (NameTextField.getText().contentEquals(record)) {
    foundUser = true;
}

joe:fjckdsoij48738423
marian:fjccoekrnvn3iernci3en
mrbean:fjd84jfn4u48fu4nf