Java Switch Statement Interview Scenario

Java - Switch case

Q1. How can a switch statement be used in Java to implement menu-based selection ?

A switch statement in Java is used to execute one block of code from multiple options based on the value of a variable. It is especially useful for menu-driven programs where a user selects an option using numbers or predefined values.

Example: Menu Selection Using switch

public class FoodMenu {

    public static void main(String[] args) {

        int choice = 3; // User selection

        switch (choice) {
            case 1:
                System.out.println("You selected Pizza.");
                break;

            case 2:
                System.out.println("You selected Burger.");
                break;

            case 3:
                System.out.println("You selected Pasta.");
                break;

            case 4:
                System.out.println("You selected Salad.");
                break;

            default:
                System.out.println("Invalid selection.");
        }
    }
}

Explanation

The switch statement evaluates the value of choice.

Each case represents a valid menu option.

The break statement prevents fall-through to the next case.

The default case executes when the input does not match any valid option.

How Valid and Invalid Inputs Are Handled

Valid inputs (1–4) trigger the corresponding menu item.

Any other value triggers the default block, displaying an error message.

This ensures controlled and predictable program flow.