Keep getting " identifier expected" error

Question

I keep getting that error, but I have not code which requires use of an <identifier>. I've been staring at this screen for like 3 hours now and I cant figure it out...Any help is greatly appreciated
public class ConTest
        Scanner scan = new Scanner(System.in);
        char c = 'z';
        String choice;
        String temp;
        System.out.println("Choose one of the following operations:");
        System.out.println("    - Infix to postfix conversion (enter the letter i)");
        System.out.println("    - Postfix expression evaluation (enter the letter p)");
        System.out.println("    - Arithmetic expression evaluation (enter the letter a)");
        System.out.println("    - Quit (enter the letter q)");
        while(c != 'q' && c != 'Q'){
            System.out.println("Which operation do you want? ");
            choice = scan.nextLine();
            c = choice.charAt(0);
            switch(c)
                case 'A':
                case 'a':
                    System.out.println("Input your infix expression:\n");
                    temp = Converter.infixToPostfix(scan.nextLine());
                    System.out.println("The value of the arithmetic expression is " +
                        Converter.postfixValue(temp) + "\n");
                    break;
                case 'I':
                case 'i':
                    System.out.println("Input your infix expression:\n");
                    System.out.println("The postfix expression is " + Converter.infixToPostfix(scan.nextLine())
                        + "\n");
                    break;
                case 'P':
                case 'p':
                    System.out.println("Input your postfix expression:\n");
                    System.out.println("The value of the postfix expression is " +
                        Converter.postfixValue(scan.nextLine()) + "\n");
                    break;
                case 'Q':
                case 'q':
                    System.out.println("quitting\n");
                    break;
                default:
                    System.out.println("Invalid choice\n");
}It's just some code to test my infixToPostfix and postfixValue static methods of a separate class.

Answer 1

System.out.println("Choose one of the following operations:");How do you expect this line of code (and the ones following it) to be executed? They are not inside any valid place. They need to be in a method, constructor, or initializer block (and maybe I left out a couple of other terms, but the point is you have these lines of code in an illegal place.