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，格納されているオブジェクトがわからなくて戸惑うことがあります。コレクションはすべてObjectとして保持する ...

Most Java developers who come from a C/C++ background have probably at one time wished for a Java equivalent of sizeof(). Although Java lacks a true sizeof() equivalent, the Instrumentation interface ...

Q: When would you create static methods as opposed to instance methods? I understand that static methods allow you to use those methods without having to create an instance of that class, and that ...

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 ...