For example, the HashMap class indexes the objects that it contains by organizing them by their hash code and equality. If you do not override those functions then the HashMap will use the Object ...

Note: Java's Object class is poorly named because an "object" is usually an instance of a class. But the class that all classes ultimately and implicitly extend from is called Object. In this course, ...

The Java Function interface is quite simple. It takes a single Java object as an argument, and returns a single Java object when the method concludes. Any method you can conjure up takes an object and ...

Although Java lacks a true sizeof () equivalent, the Instrumentation interface introduced with J2SE5 can be used to get an estimate of the size of a particular object via its getObjectSize (Object ...

Quite often a Java Stream or other component needs an object passed to it in order to perform some type of calculation or process, but when the process is complete, nothing gets returned from the ...

Example model For illustration purposes, we will use a simple model: a company with various departments, each with various employees. Here’s the class model: Company class diagram. Click on ...