How to check whether given number is Decimal or not in Java?

Problem Description :

Write a program in java that checks whether given number is Decimal or not? Do all possible validations also.

Given number is decimal or not?

Concept :

A decimal number is a number that is represented using ten distinct symbols 0-9 where these symbols represent values zero to nine.

Java Program :

package com.javamultiplex.number; import java.util.Scanner; /** * * @author Rohit Agarwal * @problem Number is decimal or not * */ public class DecimalNumber { public static void main(String[] args) { Scanner input = null; try { input = new Scanner(System.in); System.out.println("Enter number : "); String number = input.next(); /* * Regular expression that matches string containing only * digits[0-9]. */ String pattern1 = "^[0-9]+$"; if (number.matches(pattern1)) { System.out.println("It is decimal."); } else { System.out.println("It is not decimal."); } } finally { if (input != null) { input.close(); } } } }

Output :

Case 1 :

Output - Given number is decimal.

Case 2 :

Output - Given number is not decimal.

References :

https://en.wikipedia.org/wiki/Decimal

http://docs.oracle.com/javase/7/docs/api/java/lang/String.html

https://en.wikipedia.org/wiki/Regular_expression

Thank you friends, I hope you have clearly understood the solution of this problem. If you have any doubt, suggestion or query please feel free to comment below. You can also discuss this solution in our forum.

Tags : Decimal numbers, Solution in Java, Regular expressions, String, if else statement.

About Author:

I am simple guy with lot of ambitions. My main motive is to share whatever knowledge I have related to programming. With me you can easily learn how to solve any programming problem in Java.You can connect with me on social networking sites also.

Let's Get Connected: Linkedin | Facebook | Google Plus