This constructor can create objects with incorrect values
==== Here is the minimized test demonstrating the bug ====
import java.lang.Bignum;
class java_lang_Bignum_constructor {
  public static void main(String args[]) {
    Bignum b=new Bignum(0.0001F,20);
    System.out.println(b); // should print 0.00010000000000000000
    System.out.println(b.floatValue()); // should print 0.0001
  }
}
===== Here is the output of the test ====
999999.97473787520000000000
1000000.0