Conversion of a Binary Number to Decimal Number

conversionBinaryToDecimal.java

public static int binaryToDecimal (int binaryNumber){
  int digitIndex;
  int decimalNum = 0;
  int powerIndex = 0;
  while(( binaryNumber != 0) && ( binaryNumber >0)){
      digitIndex = binaryNumber % 10;
      decimalNum = decimalNum + (int)(Math.pow(2,powerIndex) * digitIndex);
      binaryNumber = binaryNumber / 10;
      powerIndex++;
    }
  return decimalNum;
}