How to make this formula work using java ? Please just a possible code snippet.

Entropy value for any decision tree leaf node that has only two types of objects in it. The formula for the entropy value is : Entropy =-1 * ((P(Type I objects)) * log2(P(Type I objects)) + (P(Type II objects)) * log2(P(Type II objects))) The log2(n) is a negative number for probabilities, so that is the reason for multiplying the whole thing by -1. The log2(n) may be easy or difficult to find in any particular programming language. See the note below for a Java solution. Entropy value for any decision tree leaf node that has only two types of objects in it. The formula for the entropy value is : Entropy =-1 * ((P(Type I objects)) * log2(P(Type I objects)) + (P(Type II objects)) * log2(P(Type II objects))) The log2(n) is a negative number for probabilities, so that is the reason for multiplying the whole thing by -1. The log2(n) may be easy or difficult to find in any particular programming language. See the note below for a Java solution