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Find out how constructors work when you have subclasses of subclasses.

An overloaded method has a different signature and is in the same class as another method. An overridden method has the same ...

Creating your first class and instantiating objects from it in Java.

You can have multiple methods with the same name as long as the number and/or types of the parameters is different.

Quick overview of classes, objects, attributes, constructors, and methods.

Composite over inheritance is an OOP design principle we've followed for several years. Like me, you might have seen it in the ...

When you pass an object to a method, you are passing a copy of the *reference* to that object. That lets you update an object's ...

Learn when to use -- and not to use -- exceptions.

Find out the limits of using casting when working with polymorphism.

The TimedTestFramework is a Java class that you can extend to implement a doTest() method. Then, you can make an instance of ...

ArrayLists let you store an arbitrary number of items, unlike Arrays, which have a fixed length. Here are some of the most-used ...

Like any other language, Java has the enum feature that allows us to enumerate items. It is helpful to list delimited items in your ...

As software architects and designers, we have a common goal: Simplicity. We want to archive success, mainly because the clarity ...

This is an audio version of the Wikipedia Article: https://en.wikipedia.org/wiki/Constructor_(object-oriented_programming) ...

Primitives (int, double, etc.) have values stored in their memory locations. Objects have references to the memory where the data ...

Converting Arrays to ArrayLists, and the remove(), contains(),indexOf(), and lastIndexOf() methods.

Classes : Part 2 : Constructors.

You can create properties and methods that are independent of any specific instance of the class, but rather belong to the class as ...

ADSB 05_06.

In Java, you can have a two-dimensional array where each row has a different number of elements. This is called a ragged array.