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

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 ...

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.

Classes : Part 3 : Operator overloading.

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

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 System.out.print() and when to use System.out.println().

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

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

Automatically create constructors, getters, and setters in IntelliJ.

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

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

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

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

What if Javascript lost its closure and lexical scope? I added dynamic scoping to a JS engine to explore this question. What if JS ...

Write a method that will take any number of arguments you would like to pass to it; it will treat them as an array.

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

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