how to convert a string to an Big int in java code example

Example 1: transformer un string en Biginteger java

String foo = "some text";
byte[] fooBytes = foo.getBytes();
BigInteger bi = new BigInteger(fooBytes);

Example 2: transformer un string en Biginteger java

package com.mkyong;

import java.math.BigInteger;

public class JavaExample {

    public static void main(String[] args) {

        int n = 100;
        System.out.println(n);

        // convert int to Integer
        Integer integer = Integer.valueOf(n);
        System.out.println(integer);

        // convert int to BigInteger
        BigInteger bigInteger = BigInteger.valueOf(n);
        System.out.println(bigInteger);

        // convert Integer to BigInteger
        //BigInteger bigInteger2 = BigInteger.valueOf(integer); // works
        BigInteger bigInteger2 = BigInteger.valueOf(integer.intValue());
        System.out.println(bigInteger2);

    }

}