BidDecimal decimal places formatting

Correct spelling:

BigDecimal decimal = new BigDecimal(12.12345);
decimal= decimal.setScale(2, RoundingMode.HALF_DOWN);
System.out.println(decimal);//Take two decimals and round up

It won't work if you write:

BigDecimal decimal = new BigDecimal(12.12345);
decimal.setScale(2, RoundingMode.HALF_DOWN);
System.out.println(decimal);

Why?
Because the setScale method will return a new BigDecimal object, and this new object is what we need.
You can output the hashcode() of the two BigDecimal objects and find that they are indeed different.