GUI.java

public interface GUI {
    String graphicalUserInterface =
            "-------------------------MENU------------------------\n" +
            "Enter 'Deposit'  or '+' to deposit money\n"              +
            "Enter 'Withdraw' or '-' to withdraw money\n"             +
            "Enter 'Balance'  or '=' to check balance\n"              +
            "Enter 'Convert' or 'c' to convert currency\n"            +
            "Enter 'SignOut'  or '/' to sign out of your account\n"   +
            "Enter 'Options'  or 'o' to change username or password\n"+
            "Enter 'turnoff' to shut down the system\n"               +
            "-------------------------MENU------------------------";
}