Why doesn't 0.1 + 0.2 equal 0.3 in Java? Trying BigDecimal for monetary calculations

I added 0.1 and 0.2 to check if they equal 0.3, but it returned false. The formula should be correct, so why?This is a ...
Ars Technica

Java - Does 0 = False and NOT 0 = True?

In Java is 0 the same as False? Not really sure how to explain what I mean. In some languages as I understand it False is the same as the result of 0 in a compare statement while True is the same as ...