public void testBitCountNeg(){
  BigInteger aNumber=new BigInteger("-12378634756382937873487638746283767238657872368748726875");
  assertEquals(87,aNumber.bitCount());
}

public void testBitCountNeg ( ) { BigInteger aNumber = new BigInteger ( "-12378634756382937873487638746283767238657872368748726875" ) ; assertEquals ( 87 , aNumber . bitCount ( ) ) ; }
bitcount ( ) of a negative number .
