Using Scanner class in Java - Mini Project: Build & Apply

Using Scanner class

📖 Scenario: You are creating a simple Java program that asks a user for their name and age, then prints a greeting message.

🎯 Goal: Build a Java program that uses the Scanner class to read user input from the keyboard and then prints a message using that input.

📋 What You'll Learn

Use the Scanner class to read input

Read a string input for the user's name

Read an integer input for the user's age

Print a greeting message including the name and age

💡 Why This Matters

🌍 Real World

Many Java programs need to get input from users, like command-line tools or simple interactive apps.

💼 Career

Knowing how to use Scanner is essential for beginner Java developers to build programs that interact with users.

1

Create a Scanner object

Write a line to create a Scanner object called scanner that reads from System.in.

Java

// Your code here

Need a hint?

Use new Scanner(System.in) to read from the keyboard.

2

Read user's name

Add a line to read a string input from scanner into a variable called name using scanner.nextLine().

Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        // Your code here
    }
}

Need a hint?

Use scanner.nextLine() to read a full line of text.

3

Read user's age

Add a line to read an integer input from scanner into a variable called age using scanner.nextInt().

Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        // Your code here
    }
}

Need a hint?

Use scanner.nextInt() to read an integer number.

4

Print greeting message

Write a line to print the message Hello, {name}! You are {age} years old. using System.out.println and the variables name and age.

Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        int age = scanner.nextInt();
        // Your code here
    }
}

Need a hint?

Use System.out.println and string concatenation with name and age.