Can't compile. Error message

Question

I am trying to get an input from console, assign it to a string variable. Then I'd like to concatinate it with another variable. Provided if the user enters the right character each time, soon it'll make up a word. Once this word matches the desired one the loop stops. Need your help though.

public class expl {

    public static void main(String[] args) {
        String consatinate = "a";
        String needed = apple;
        while (!consatinate.equals(needed)) {
            System.out.println("Enter a letter");
            String input = System.console().readLine();
            consatinate = consatinate.concat(input);        
            System.out.println(consatinate);
        }
    }
}

Error message:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: apple cannot be resolved to a variable at expl.main(expl.java:6)

Answer 1

Apple is a literal string, so it should have quotations around it:

public class expl {

    public static void main(String[] args) {
        Scanner inputScanner = new Scanner(System.in);
        String consatinate = "a";
        String needed = "apple";
        while (!consatinate.equals(needed)) {
            System.out.println("Enter a letter");
            String input = inputScanner.nextLine();
            consatinate = consatinate.concat(input);        
            System.out.println(consatinate);
        }

        inputScanner.close();
    }
}

I would also asume that "consatinate" should be named concatenate, but that's just a guess.