The Java Tutorial goes on to list bullets for when an abstract class should be considered and for when an interface should be considered. Unsurprisingly, these are derived from the previously ...

Java is an object-oriented language, and Java constructors are how you create objects. Learn about object creation in this full Java constructor tutorial.

Learn the four types of polymorphism in Java, then start using subtype polymorphism to execute different forms of the same Java method.

For more on that, check out our guide to Android development for beginners. For the purposes of this Java tutorial, it may be easier to write your code directly into a Java compiler app.

How to use Java's default constructor Although the default constructor in Java is convenient and easy to use, developers must understand some important rules about its existence and implementation.