Java's equivalent to the return function in JavaScript

Currently, I am in the process of adapting three.js into Java while also incorporating my own modifications and enhancements. One specific challenge I am facing involves determining the best approach for managing reflection within the code.

As part of this adaptation, I need to incorporate certain methods that are present in three.js, such as THREE.Line3.closestPointToPointParameter. However, I am uncertain about the most effective way to integrate these functions into Java. Should I stick to the original implementation or should I consider customizing the method to better suit my needs? I am eager to explore different strategies and suggestions in order to optimize this transition.

javajavascriptreflectionthree.js

Answer №1

In the realm of Java, functions are not considered first-class citizens, meaning they cannot be returned or assigned to variables. The customary approach in Java is to utilize anonymous inner classes for this purpose. Take for instance:

interface FunctionInterface {
  float bar(int x);
}

FunctionInterface foo() {
  return new FunctionInterface() {

    @Override
    public float bar(int x) {
      return x;
    }

  };
}

It's worth noting that with the impending arrival of Java 8, Closures will be introduced, rendering this process less verbose.

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