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

Problem Description :

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

Given number is binary or not?

Concept :

A binary number is a number that is represented using two distinct symbols 0(zero) and 1(one).

Java Program :

	package com.javamultiplex.number;
	import java.util.Scanner;
	/**
	*
	* @author Rohit Agarwal
	* @category Number Problems
	* @problem Number is binary or not
	*
	*/
	public class BinaryNumber {
	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]+$";
	if (number.matches(pattern1)) {
	/*
	* Regular expression that matches string containing only binary
	* digits[0-1].
	*/
	String pattern2 = "^[01]+$";
	if (number.matches(pattern2)) {
	System.out.println("It is binary.");
	} else {
	System.out.println("It is not binary.");
	}
	} else {
	System.out.println("Please enter valid number.");
	}
	} finally {
	if (input != null) {
	input.close();
	}
	}
	}
	}

view raw BinaryNumber.java hosted with ❤ by GitHub

Output :

Case 1 :

Output - Given number is binary

Case 2 :

Output - Given number is not binary

References :

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

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 : Binary 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