Binary to Decimal Number

package com.JavaInterview.Programs;

import java.util.*;

/**
 * Find Out Factorial of a number
 * 
 * @author:http://javainterviewprograms.blogspot.in/
 * 
 */
public class BinaryToDecimal {

   /*Convert Binary to decimal */

 public int toDecimal(int binary) {

  /**if you take input binary number as string then while fetching string.charAt(index) 

   * and type cast to integer -> it will give ASCII value of that char(0=48 & 1=49) and

   * it will cause result to differ from original decimal value **/

  int decimalNumber = 0;

  int power = 0;

  while (binary > 0) {

   int tmp = binary % 10;

   decimalNumber += tmp * Math.pow(2, power);

   binary = binary / 10;

   power++;

  }

  return decimalNumber;

 }

 /*To Check if number is binary or not*/

 public boolean isBinary(int binary)

 {

  boolean status=true;

  while(true)

  {

   if(binary==0)

   {

    break ;

   }

   else

   {

    int tmp=binary%10;

    if(tmp>1)

    {

     status =false;

     break;

    }

    binary=binary/10;

   }

  }

  return status;

 }

 public static void main(String args[]) {

  BinaryToDecimal B2D = new BinaryToDecimal();

  Scanner input = new Scanner(System.in);

  System.out.println("Please enter Binary Number");

  int bNumber = input.nextInt();

  if(B2D.isBinary(bNumber))

  {

  System.out.println(bNumber + " to Decimal :" + B2D.toDecimal(bNumber));

  }

  else

  {

   System.out.println("It's not a Binary Number ");

  }

 }

}

Output:

Please enter Binary Number

1011

1011 to Decimal :11