public void testNegatePositive(){
  String a="92948782094488478231212478987482988429808779810457634781384756794987";
  int aScale=41;
  String c="-92948782094488478231212478987482988429808779810457634781384756794987";
  int cScale=41;
  BigDecimal aNumber=new BigDecimal(new BigInteger(a),aScale);
  BigDecimal cNumber=new BigDecimal(new BigInteger(c),cScale);
  assertEquals("incorrect value",cNumber,aNumber.negate());
}

public void testNegatePositive ( ) { String a = "92948782094488478231212478987482988429808779810457634781384756794987" ; int aScale = 41 ; String c = "-92948782094488478231212478987482988429808779810457634781384756794987" ; int cScale = 41 ; BigDecimal aNumber = new BigDecimal ( new BigInteger ( a ) , aScale ) ; BigDecimal cNumber = new BigDecimal ( new BigInteger ( c ) , cScale ) ; assertEquals ( "incorrect value" , cNumber , aNumber . negate ( ) ) ; }
negate ( ) for a positive bigdecimal
