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

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

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

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

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

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.

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

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

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 ...

Classes : Part 3 : Operator overloading.

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

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

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

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

ADSB 05_06.

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

A parent class variable can refer to a child class object. This is called polymorphism, and this video introduces the concept.