How to Get Input from a User in Java

1. 
   
2. 
   1
   Import the Scanner class. You can either choose to import thejava.util.Scanner class or the entire java.util package. To import a class or a package, add one of the following lines to the very beginning of your code: 

   import java.util.Scanner; // This will import just the Scanner class.
   import java.util.*; // This will import the entire java.util package.
   

   Ad
3. 
   2
   Initialize a new Scanner object by passing the System.in input stream to the constructor. System.in is the standard input stream that is already open and ready to supply input data. Typically this stream corresponds to keyboard input. 

   Scanner userInputScanner = new Scanner(System.in);
   
4. 
   3
   You can now read in different kinds of input data that the user enters. The Scanner class supports getting primitives such as int, byte, short, long in addition to getting strings. Here are some methods that are available through the Scanner class:

   • Read a byte - nextByte()
   • Read a short - nextShort()
   • Read an int - nextInt()
   • Read a long - nextLong()
   • Read a float - nextFloat()
   • Read a double - nextDouble()
   • Read a boolean - nextBoolean()
   • Read a complete line - nextLine()
   • Read a word - next()

   Here is an example of a program that uses different methods of the Scanner class to get different types of input: 

   import java.util.Scanner;
    
   public class ScannerExample {
       public static void main(String[] args) {
           // Initiate a new Scanner
           Scanner userInputScanner = new Scanner(System.in);
    
           // Testing nextLine();
           System.out.print("\nWhat is your name? ");
           String name = userInputScanner.nextLine();
    
           // Testing nextInt();
           System.out.print("How many cats do you have? ");
           int numberOfCats = userInputScanner.nextInt();
    
           // Testing nextDouble();
           System.out.print("How much money is in your wallet? $");
           double moneyInWallet = userInputScanner.nextDouble();
    
           System.out.println("\nHello " + name + "! You have " + numberOfCats
                   + (numberOfCats > 1 ? " cats" : " cat")
                   + " and $" + moneyInWallet + " in your wallet.\n");
       }
   }