不同层次上面向对象软件的特性

Understanding what software looks like, especially good software, is a key question for the research on the effect of methodologies and design principles on software. And software is a complex piece of artificial work which is composed of components at different levels of granularity. It is important to understand whether the properties of software change or remain the same on different levels. As an effort toward answering these questions, we conduct empirical studies on three open source software and analyze these software systems at three levels, namely package, class and method. Statistical analyses are carried and results from the analysis are compared. Our findings provide some proof of engineering efforts on software, as far as structure properties are concerned.