Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

正体不明のオブジェクトのクラスを調べるには？ J2SEのコアパッケージでも頻繁に利用されていますが，コレクションクラスを利用していると ...

Object-oriented systems are usually partitioned into layers of related responsibilities and only dependencies in one direction are allowed, from higher layers (more specific, less reusable) to lower ...

What is the single responsibility principle? The single responsibility principle in Java demands that a class serves a single, clear purpose. Any attempt to add peripheral functionality to a ...

The agent class above exposes a statically available method for accessing Instrumentation.getObjectSize(Object). The next code listing demonstrates a simple ‘application’ that makes use of it.

Instance variables contain data associated with an object, such as its description, the types of messages it can receive, the objects it can receive messages from, and the objects it can send messages ...