Java User Input

Java User Input (Scanner)

To get user input in Java, we can use the Scanner class, which is part of the java.util package.

The Scanner class has many methods for reading input of various types.

Using the Scanner Class

To use the Scanner class, you must first import it and then create an object of the class.

import java.util.Scanner;  // Import the Scanner class

class Main {
  public static void main(String[] args) {
    Scanner myObj = new Scanner(System.in);  // Create a Scanner object
    System.out.println("Enter username");
    String userName = myObj.nextLine();  // Read user input
    System.out.println("Username is: " + userName);  // Output user input
  }
}

Note: Interactive user input does not work in the simple code editor on this page. You would need to run this code in a local development environment or a more advanced online IDE to test it properly.

Input Types

In the example above, we used the nextLine() method, which is used to read String values. To read other types, you can use the appropriate method:

Scanner myObj = new Scanner(System.in);

System.out.println("Enter name, age and salary:");
String name = myObj.nextLine(); // Reads string
int age = myObj.nextInt();       // Reads integer
double salary = myObj.nextDouble(); // Reads double
System.out.println("Name: " + name);
System.out.println("Age: " + age);
System.out.println("Salary: " + salary);