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 ...

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 ...

In a recent project, I needed an easy way to traverse Java object trees and extract values from the objects. Instead of continually going through huge iterator-if ...

Community driven content discussing all aspects of software development from DevOps to design patterns. The easiest way to garner user input in a Java program is to use the System’s Console class.

OpenJDK proposal to reduce the Java object header by half or more would lower memory and CPU usage on all Java workloads. Java could get a smaller object header, thus improving memory usage, under a ...