BigDecimal equals() versus compareTo()

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The answer is in the JavaDoc of the equals() method:

Unlike compareTo, this method considers two BigDecimal objects equal only if they are equal in value and scale (thus 2.0 is not equal to 2.00 when compared by this method).

In other words: equals() checks if the BigDecimal objects are exactly the same in every aspect. compareTo() “only” compares their numeric value.

As to why equals() behaves this way, this has been answered in this SO question.

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