Java Fundamentals · Operators, Strings & Input · Lesson 9 of 22
Getting User Input with Scanner
Concept
Getting User Input with Scanner
The Scanner class reads input from the console, letting a program react to whatever the user types.
By the end of this lesson
- Explain the core idea behind Getting User Input with Scanner.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
How to study this page
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
ExampleRunnable
import java.util.Scanner;
Scanner input = new Scanner(System.in);
System.out.print("Enter your name: ");
String name = input.nextLine();
System.out.println("Hi, " + name);Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Getting User Input with Scanner. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Write code that reads a number from the user with Scanner and prints double that number.
Loading editor…
Console