Creating a sub menu using String/char?
<pre><code>public static String getSubMenu(String submenu){
        Scanner keyboard = new Scanner(System.in);
        String chosen="", A="A",B="B", a="a", b="b";
        do{
        chosen = keyboard.next();
        keyboard.nextLine();
        System.out.print("\n\n");
        }while(chosen.compareTo(A));
        return chosen;
    }
    //This function below is fine.
    public static void Menu(){
        String unem="";
        do{
        System.out.println("Sub Menu");
        System.out.println("Select an Option\n\n");
        System.out.println("a.Sort by name\n" +                            
                           "b.Sort by time\n" +
                           "c.Exit sub-menu\n\n");
        System.out.print("Input the number for the selected option: ");
        unem= getSubMenu(unem);
        if("a".equals(unem)|| "A".equals(unem)){

        }
        if("b".equals(unem)|| "B".equals(unem)){

        }
    }while ("a".equals(unem) ||"b".equals(unem) || "A".equals(unem) || "B".equals(unem));

    }

}
</code></pre>

<p>Hi, I'm trying to make a sub menu. As you can see in the function <code>Menu</code>, when <code>getSubMenu</code> is called the user has to input a selected option in the function <code>getSubMenu</code>. I looked through my textbook and online and it doesn't seem you can use <code>char</code> within arguments such as </p>

<pre><code>char a="a";
if(a != b); 
</code></pre>

<p>If you can use characters instead of strings in the functions above please tell.</p>

<p>But moving on. What I am trying to do now is to get <code>getSubMenu</code> to return a String containing either <code>'A' || 'a' || 'b' || 'B' || 'c' || 'C'</code> and then loop when the user does not put any of these as an input. I've tried attempting to use <code>compareTo</code> but I receive a <code>Type mismatch: cannot convert from int to boolean error</code> how can I improve on this. What syntax can I use so that this can work.</p>

<p>Thanks for everyone who will help and contribute to this.</p>

<p>EDITED: NEW WORKING FUNCTION</p>

<pre><code>  public static String getSubMenu(String submenu){
            Scanner keyboard = new Scanner(System.in);
            boolean looped = true;
            String chosen="";
            do{
            chosen = keyboard.next();
            keyboard.nextLine();
            System.out.print("\n\n");
            if("a".equals(option)|| "A".equals(option) || "b".equals(option)|| "B".equals(option) || "c".equals(option)|| "C".equals(option)){
                looped = false;
            }
            else
                System.out.println("Wrong input");
            }while(looped);
            return option;
</code></pre>

<p>It may of not been what I was aiming for but it still did it job.</p>
