Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

import java.util.InputMismatchException;
import java.util.Scanner;

// File: BasicIO.java - demonstrates Scanner input and formatted output

public class BasicIO {

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

System.out.println("=== Java Basic I/O Demo ===");
        System.out.print("Enter your name: ");
        String name = scanner.nextLine();

int age = 0;
        boolean valid = false;
        while (!valid) {
            System.out.print("Enter your age: ");
            try {
                age = scanner.nextInt();
                if (age < 0 || age > 150) {
                    System.out.println("Age must be between 0 and 150. Try again.");
                } else {
                    valid = true;
                }
            } catch (InputMismatchException e) {
                System.out.println("Please enter a whole number.");
                scanner.nextLine(); // discard bad input
            }
        }

// Formatted output using printf
        System.out.printf("%nHello, %s! You are %d years old.%n", name, age);
        System.out.printf("In 10 years you will be %d.%n", age + 10);

scanner.close(); // always close resources
    }
}