Convert binary string to BigInteger

import java.math.BigInteger;
import java.util.Arrays;

public class Main {
  public static void main(String[] argv) throws Exception {

    BigInteger bi = new BigInteger("100101000111111110000", 2);

    byte[] bytes = bi.toByteArray();
    
    System.out.println(Arrays.toString(bytes));
  }
}

[18, -113, -16]