I am using this blog post to build upon these examples to demonstrate the utility of Java 7’s Objects.equals (Object, Object) method and will demonstrate the usefulness of Objects.hash (Object ...

However, the Java Platform provides a data structure that greatly simplifies the use of reference objects like this, called the java.util.WeakHashMap class. WeakHashMap works exactly like a hash ...

method provides the hash code of the provided Object as would be returned from its ultimate Object parent regardless of whether the passed-in object overrode the hashCode method .