In Java 101: Inheritance in Java, Part 1, you learned how to leverage inheritance for code reuse, by establishing is-a relationships between classes. Composition is a closely related programming ...

In object-oriented programming, composition is a design principle where a class contains one or more objects of other classes as member variables. This allows you to create more complex objects by ...

In Java, composition is a design principle that allows you to create complex objects by combining simpler objects or types. It is a way to achieve code reuse without using inheritance. Composition ...

チャット先生（通称:先生）： オブジェクト指向マスター。普段は優しく、たまにユーモアも交えながら解説。 ボット助手（通称:ボット君）： プログラミングを始めたばかりの若手。素朴な疑問を投げかけるのが得意。 ボット君： 先生！前回のポリモー ...