if else loop points output to else statement every time [duplicate]

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public class Pizza {

public static void main(String[] args)
{

    // Greeting to the pizza shop.
    System.out.println("Welcome to Adam's Pizza Shop.");
    System.out.println();

    // Asking the user for their name and scanner utility for input.
    Scanner  scan;
    scan = new Scanner(System.in);
    System.out.print("What is your name? ");
    String name = scan.next();
    System.out.println("Welcome " + name);
    System.out.println();

    // Prompt the user to choose between three types of pizza.
    System.out.println("These are the three types of pizza we sell here at Adam's Pizza Shop:");
    System.out.println("Cheese--------" + "C");
    System.out.println("Margherita----" + "M");
    System.out.println("Sausage-------" + "S");
    System.out.println();


    // Asking what kind of pizza the customer wants
    System.out.println("Type the letter for the type of pizza you want: ");
    Scanner scan2;
    scan2 = new Scanner(System.in);
    String userChoice = scan2.next();




    // If statements for when the customer selects the type of pizza they would like
    if (userChoice == "C") {
        System.out.println("12 inch    $9.50");
        System.out.println("16 inch    $13.50");
    }
    if (userChoice == "M") {
        System.out.println("12 inch    $11.50");
        System.out.println("16 inch    $15.50");
    }
    if (userChoice == "S") {
        System.out.println("12 inch    $12.50");
        System.out.println("16 inch    $16.50");
    }
    else {
        System.out.println("Not a valid selection, goodbye " + name + "!");
    }       
}

}

//Whenever I put in an option for what style of pizza I get the same not valid selection from my //else loop. I need a code where I will select cheese pizza and then that user input will take me to //the size and price of the pizza.