What does it say in EvaluationException and the MethodBindingMethodExpressionAdapter in their documentation about number of arguments? If you are using reflection, you would have to pass an Object[] with the correct number of members to match the method signature.
As an aside, if you put 24 entries into a HashMap with a load factor of 0.75, it will need a capacity of at least 30 buckets to hold them (because 0.75 * 30 = 24).
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus