When a Java program is executed, one or more class loaders locate and load all the classes ... to its parent class loader, the extension class loader. Aside from loading classes from the classpath ...

The first half of this introduction to Java inheritance teaches you how to use the extends keyword to derive a child class ... classes inherit accessible fields and methods from their parent ...

Imagine you are an expert object-oriented Java developer who ... Marking a class as final prevents all inheritance, by anyone -- even the original developer cannot inherit from one of their own final ...

Java's default constructor ... constructor of its parent class. For more meaningful initializations of variables, you can provide a no-argument constructor of your own and override the default ...