Many programming languages allow passing objects by reference or by value. In Java, we can only pass object parameters by value. This imposes limits and also raises questions. For instance ...

Now let's take a look at a slightly more useful example that shows how reference objects can be ... what if we could remove weak references automatically as they are cleared? The Java Platform ...

Copying objects is a common Java ... we change the reference variable. Now we know that the clone() method won’t work for a deep copy if we have a simple override. Let’s see how we can make ...