functional programming in Java

Question

how can you emulate functional programming in java, specifically, doing things like map a function to a collection of items?

map(func, new String[]{\"a\",\"         


        

Answer 1

Just wrap the function you want to apply on the list with a class or an interface.

public interface Func {
  Object f(Object input);
}

public void map (Func func, Object[] arr) {
  for(int i=0;i