[Q#5153811][A#5153956] How to convert a hexadecimal string to long in java?

https://stackoverflow.com/q/5153811

I want to convert a hex string to long in java. I have tried with general conversion. But I am getting this error message: Is there any way to convert String to long in java? Or am i trying which is not really possible!! Thanks!

Answer

https://stackoverflow.com/a/5153956

Long.decode(str) accepts a variety of formats: Accepts decimal, hexadecimal, and octal numbers given by the following grammar: DecodableString: Sign: But in your case that won't help, your String is beyond the scope of what long can hold. You need a BigInteger: Output: 23846102773961507302322850521 For Comparison, here's Long.MAX_VALUE: 9223372036854775807

APIzation

String s = "4d0d08ada45f9dde1e99cad9";
BigInteger bi = new BigInteger(s, 16);
System.out.println(bi);

package com.stackoverflow.api;

import java.math.BigInteger;

public class Human5153956 {

  public static BigInteger hexStrToBigInteger(String s) {
    BigInteger bi = new BigInteger(s, 16);
    return bi;
  }
}

package com.stackoverflow.api;

import java.math.BigInteger;

/**
 * How to convert a hexadecimal string to long in java?
 *
 * @author APIzator
 * @see <a href="https://stackoverflow.com/a/5153956">https://stackoverflow.com/a/5153956</a>
 */
public class APIzator5153956 {

  public static BigInteger convertString(String s) throws Exception {
    BigInteger bi = new BigInteger(s, 16);
    return bi;
  }
}