44. Comparing BigDecimals

• Be careful using .equals() method to compare BigDecimals --

  • the .equals() compares both the values and the scale.

• Instead, to compare unrounded valus of the two BigDecimals, use the .compareTo() and .signum() methods:

  
      amountA.compareTo(amountB);  // returns (-1 if A < B), (0 if A == B), (1 if A > B)
      amountA.signum(); // returns (-1 if A < 0), (0 if A == 0), (1 if A > 0)