JAVA USER INPUT

How to get the User Input in Java ?

In our previous tutorial we have learnt how to take the input from command line. If not then kindly have a look at Java Command Line Arguments. Now we will learn about taking the user input using object of Scanner class.

Scanner class lies within java.util package that means we have to import java.util package before we can use the object of Scanner class.

It is used to read input of Primitive data types (int, char, byte, float, double, long) in Java. Below is the syntax for creating object of Scanner class.

Syntax

Example 1

// Java program to read an integer using System.in
import java.util.*;
public class ReadInputExample{
     public static void main(String args[]){  
         Scanner sc= new Scanner(System.in); // object of Scanner class created
         System.out.print("Enter your age ");
         int age = sc.nextInt();  // it will read user input
         System.out.println("Your age is : " + age);
    }
}

Example 2

// Java program to read an integer using System.in
import java.util.*;
public class ReadInputExample{
     public static void main(String args[]){  
         Scanner sc= new Scanner(System.in); // object of Scanner class created
         System.out.print("Enter your College name ");
         String name= sc.nextLine();  // it will read user input
         System.out.println("Your College name is : " + name);
    }
}

In the above examples given we have used nextInt() and nextLine() methods to read integer and string. You can also read other types using the given table below under section Java Scanner Class methods. Give a try yourself.

Java Scanner Class methods

There are various methods provided by Java Scanner class to read different Primitive data types.