(Java) Program wont go through if statement even though the if statement is blatantly true

I am doing a project for my CHS Java course that models the Monty Hall gameshow. But for some reason, this if statement wont 'activate' even though it is true... any ideas?

System.out.println("There is a goat behind Door #" + (goatSpot));   
System.out.println("Would you like to switch your door? (yes or no) ");
String switchChoice = input.next();
switchChoice = switchChoice.toUpperCase();
if (switchChoice == "YES")
{           
    if (choice == 1 && goatSpot == 2)
    {
        choice = 3;
    }
    else if (choice == 1 && goatSpot == 3)
    {
        choice = 2;
    }
    else if (choice == 2 && goatSpot == 3)
    {
        choice = 1;
    }
    else if (choice == 2 && goatSpot == 1)
    {
        choice = 3;
    }
    else if (choice == 3 && goatSpot == 1);
    {
        choice = 2;
    }
    if (choice == 3 && goatSpot == 2)
    {
        choice = 1;
    }
}

It just completely ignores everything inside the if statement....