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  • Java User Input

Java User Input

The Scanner class is used to get user input, and it is found in the java.util package.

To use the Scanner class, create an object of the class and use any of the available methods found in the Scanner class documentation. In our example, we will use the nextLine() method, which is used to read Strings:

Example

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

  }

}

If you don't know what a package is, read our Java Packages Tutorial.

Input Types

In the example above, we used the nextLine() method, which is used to read Strings. To read other types, look at the table below:

Method

Description

nextBoolean()

Reads a boolean value from the user

nextByte()

Reads a byte value from the user

nextDouble()

Reads a double value from the user

nextFloat()

Reads a float value from the user

nextInt()

Reads a int value from the user

nextLine()

Reads a String value from the user

nextLong()

Reads a long value from the user

nextShort()

Reads a short value from the user

In the example below, we use different methods to read data of various types:

Example

import java.util.Scanner;

 

class Main {

  public static void main(String[] args) {

    Scanner myObj = new Scanner(System.in);

 

    System.out.println("Enter name, age and salary:");

 

    // String input

    String name = myObj.nextLine();

 

    // Numerical input

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