The first half of this introduction to Java inheritance teaches you how to use the extends keyword to derive a child class ... specific “parent” categories (higher up). The example in Figure ...

When you are considering using inheritance, ask yourself whether the subclass ... try the same example using composition: import java.util.HashSet; import java.util.Set; public class ...

If another developer attempts to extend your parent ... your inheritance Need to limit the number of possible subclasses in your codebase? Here comes Java's sealed classes to your rescue. Advanced ...

Twenty-three years ago, in his Design Principles and Design Patterns article, Robert "Uncle Bob" Martin boiled down the Liskov substitution principle to the idea that "derived classes ... like a ...