Java User Input

Java user input allows users to provide data to a program while it is running. In Java, we can take input from the user using the Scanner class available in the java.util package.

Taking user input makes Java programs interactive because users can enter values like numbers, names, and other information according to their requirements.

What is User Input in Java?

User input in Java means receiving data from the user through the keyboard. The program waits for the user to enter a value and then uses that value to perform different operations.

Java provides the Scanner class to read different types of input such as strings, integers, floating-point numbers, and boolean values.

Import Scanner Class in Java

Before using the Scanner class, we need to import it from the java.util package.

import java.util.Scanner;

Creating Scanner Object

After importing the Scanner class, we need to create an object of Scanner to read input from the user.

Scanner  input = new  Scanner(System.in);

Java User Input Example

The following example shows how to take a user's name as input and display it.

import 
java.util.Scanner;
public class Main{
    public static void main(String[] args){
         Scanner input = new Scanner(System.in); 
        System.out.print("Enter your name: ");
        String name = input.nextLine();
        System.out.println("Hello " + name);
    }
    }

Reading Different Types of Input in Java

The Scanner class provides different methods to read various types of data from users.

Example of Taking Integer Input

Scanner input = new Scanner(System.in); 
System.out.print("Enter age: ");
int age = input.nextInt(); 
System.out.println(age);

Why Use Scanner Class in Java?

Java User Input Best Practices