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ISBN: (纸本)9787302408055

关键词： Visualization on software testing   Code coverage   Web-based testing tool   Java  

摘要： The visualization of statement coverage (C0) and branch coverage (C1) measurement output can be used in several ways to improve the verification and validation process. The result displays are percentage of a successful tested code and visual information with highlighted in bright green as information of executed lines, bright yellow for statement coverage and dark green The web-based testing tool significantly reduces the time for testing the code and help user to understand the behavior of the tested code.

关键词： 大数据   计算机   教学改革  

摘要： 大数据揭开了第三次信息化革命的序幕,在大数据的时代背景下,教育领域必将产生重大变革。该文从计算机软件编程类课程《Java程序设计》的教学改革入手,探讨基于大数据的教学实践中遇到的各种问题,为将来的大数据教学改革提供参考。

关键词： java语言   程序设计   案例教学法   应用探索  

摘要： 基于案例教学法的基本含义及相关特点,对java语言程序设计教学中案例教学法具体实施步骤及应该注意问题予以分析,在课程实践中,案例教学法的应用,有助于学生实践能力的培养,不断提升学生的综合素质及技能,为社会输送更多的IT人才,促进教学目标的实现。

关键词： PUSH注册机制   J2ME平台   JAVA移动应用程序  

摘要： PULL方式是较为常用的一种应用程序运行方式,这种运行方式需要用户以手动的形式来实现应用程序的启动,这也就说明PULL方式无法实现某些特定情况下程序启动的要求,此时,合理的运用PUSH方式实现程序的运行也就非常必要了,PUSH方式可以实现JAVA移动应用程序的自动启动运行。本文主要研究了如何运用PUSH方式在J2ME平台下来自动启动运行JAVA移动应用程序,为了使读者加深对PUSH技术的认识,本文首先介绍了该技术,然后对PUSH注册机制的实现过程进行了详细阐述,并实际开发了一个可以应用到JAVA手机上的MIDlet应用程序对移动应用程序开发中采用PUSH注册机制进行了验证。

关键词： JAVA程序设计   慕课   网络教学  

摘要： 文章针对武汉商学院信息工程系计算机应用专业所开设的JAVA程序设计课程的课堂教学环节,结合访问美国乔治梅森大学的体验,探讨了采用慕课的相关元素辅助教学的可行的方式方法。总结了保障网络教学成功的因素。

关键词： Exception handling   Bugs   Repository mining  

摘要： Most mainstream programming languages provide constructs to throw and to handle exceptions. However, several studies argue that exception handling code is usually of poor quality and that it is commonly neglected by developers. Moreover, it is said to be the least understood, documented, and tested part of the implementation of a system. Nevertheless, there are very few studies that analyze the actual exception handling bugs that occur in real software systems or that attempt to understand developers' perceptions of these bugs. In this work we present an exploratory study on exception handling bugs that employs two complementary approaches: a survey of 154 developers and an analysis of 220 exception handling bugs from the repositories of Eclipse and Tomcat. Only 27% of the respondents claimed that policies and standards for the implementation of error handling are part of the culture of their organizations. Moreover, in 70% of the organizations there are no specific tests for the exception handling code. Also, 61% of the respondents stated that no to little importance is given to the documentation of exception handling in the design phase of the projects with which they are involved. In addition, about 40% of the respondents consider the quality of exception handling code to be either good or very good and only 14% of the respondents consider it to be bad or very bad. Furthermore, the repository analysis has shown (with statistical significance) that exception handling bugs are ignored by developers less often than other bugs. We have also observed that while overly general catch blocks are a well-known bad smell related to exceptions, bugs stemming from these catch blocks are rare, even though many overly general catch blocks occur in the code. Furthermore, while developers often mention empty catch blocks as causes of bugs they have fixed in the past, we found very few bug reports caused by them. On top of that, empty catch blocks are frequently used as part of bu

关键词： 程序理解   内存行为   引用分析   度量策略  

摘要： 本文提出一种基于对象引用关系的Java程序内存行为分析方法.与传统的通过内存消耗的大小来确定程序中数据结构的重要性并分析相关内存行为的方法不同,本文方法同时考虑内存消耗和内存支配两个因素来确定一个数据结构在程序内存行为中的重要性,通过研究数据结构之间在内存使用上的支配关系和对数据结构进行引用分析,得到程序中重要的内存行为.实验结果表明该方法能有效地分析程序的内存行为,且对比其它方法能提供更加准确的内存行为分析结果.