In my previous article, I described how to use Java’s reference objects, SoftReferenceand WeakReference, to build weak references and mark blocks as reclaimable in a simple application.

You might know that Java passes by value, but it helps to understand why. Here's what happens when you pass mutable and immutable object references in Java.

If we change the product or copyOfProduct objects, the result will be a change to the original Product object. That’s because every time we create an object in Java, an object reference is ...