Users Input in JAVA | Java Language | Coding Winds

USER INPUT IN JAVA

User inputs are the most needed and commonly seen things in any program. User inputs gives us the flexibility of storing the values inside the variables given by  the user after running the program, instead of initialising the variables at the first place. So as we talked earlier about importing packages and classes, for taking a user input we first need to import the scanner class or simply the whole package (which already contains the scanner class).

Ex:

import java.util.*;

or

import java.util.Scanner;

After importing the scanner class or the whole package, we can create a Scanner class object. For creating a scanner object look at the example below.

Ex:

Scanner sc = new Scanner(System.in);

After creating the scanner object we can use it to take inputs. For taking inputs we will use ‘sc.nextInt()’ method. But for different datatypes we have different methods. The table given below shows us the different methods used to take the inputs for different types.

boolean	nextBoolean();
short	nextShort();
Int	nextInt();
long	nextLong();
byte	nextByte();
double	nextDouble();
float	nextFloat();
String	nextLine();

 

Now many of you might be thinking that there is no method to take a character input in java. Unfortunately yes, java doesn’t have any direct method to take a character input but who says we can’t take one? For taking a character as input look at the example below:

Ex:

Char ch = sc.next().charAt(0);

So in the above example the scanner method reads a string from the input, but only returns a single letter, since it has a ‘charAt()’ method with the index 0 , so here basically a string gets created in which we are using only the 0 index.

Hope you are clear on this  topic do read our more articles on JAVA LANGUAGE.

If you still have any doubt on this topic then do come to us via email "sophomoretechs@gmail.com" or via Instagram "@coding.winds".

This article is SUBMITTED By : Pranjal Rai

Do subscribe to our daily blog update by clicking here.

Thank You!