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Gerardo Bautista
Para N caracteres aqui esta,
August 29, 2008 at 7:59 PM

public static BigInteger hexadecimalToDecimal(String hex) throws NumberFormatException {
BigInteger bigInt1= new BigInteger("16");
BigInteger bigInt2= new BigInteger("0");
for(int i=0; i<hex.length(); i++) {
bigInt2=bigInt2.add(bigInt1.pow(i).multiply(bigInt1.pow(i).valueOf(Long.parseLong(Character.toString(hex.charAt(hex.length()-(i+1))),16))));
}
return bigInt2;
}
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