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关键词： 项目教学法   实施   Java   Web程序设计  

摘要： 随着企业对实用型人才需求的增加,传统教学模式已不能适应时代的发展,必须寻求一种新的教学手段来提高学生动手实践的能力。在《Java Web程序设计》教学中引入项目教学法,充分激发了学生学习的积极性,提高了课堂的教学质量。本文主要对项目教学法在《Java Web程序设计》课程中的实施进行了深入的探讨。

关键词： 代码动态生成   Java虚拟机   Java类文件   Bytecode   ASM  

摘要： 代码动态生成是指在程序运行时根据实际情况即时生成需要的类代码。它可以提高程序的灵活性,已被用于很多应用架构、脚本语言的实现中。为帮助学生掌握代码动态生成技术,探讨了相关技术的实现方法、工具的应用和教学思路。

关键词： parallel programming   pipeline   Java   performance  

摘要： Programmers can no longer rely solely on micro-architectural and technology improvements to have their programs running faster. In today's multicore chips, parallel code needs to be explicitly written to extract any benefits from the extra available processing power. A recently proposed technique to parallelize general-purpose programs' loops at the binary level, called decoupled software pipeline (DSWP), has shown good performance numbers only under the assumption of a fast hardware intercore communication queue. In this paper, we propose Java-DSWP, a source-level DSWP-based parallelization technique that is much simpler than original DSWP and can be used to effectively parallelize Java applications. In addition, we propose and evaluate a software intercore communication scheme that enables code parallelized through Java-DSWP to be executed in commodity machines, thus not requiring a hardware intercore communication queue to be efficient, as DSWP does. We analyze three memory communication queue implementations and show experimental results that reveal an average 48% speedup on some SPCjvm2008 benchmarks. Copyright (c) 2012 John Wiley & Sons, Ltd.

关键词： Fault localization   Key block chain   Noise reduction   Program debugging  

摘要： Context: Existing fault-localization techniques combine various program features and similarity coefficients with the aim of precisely assessing the similarities among the dynamic spectra of these program features to predict the locations of faults. Many such techniques estimate the probability of a particular program feature causing the observed failures. They often ignore the noise introduced by other features on the same set of executions that may lead to the observed failures. It is unclear to what extent such noise can be alleviated. Objective: This paper aims to develop a framework that reduces the noise in fault-failure correlation measurements. Method: We develop a fault-localization framework that uses chains of key basic blocks as program features and a noise-reduction methodology to improve on the similarity coefficients of fault-localization techniques. We evaluate our framework on five base techniques using five real-life median-scaled programs in different application domains. We also conduct a case study on subjects with multiple faults. Results: The experimental result shows that the synthesized techniques are more effective than their base techniques by almost 10%. Moreover, their runtime overhead factors to collect the required feature values are practical. The case study also shows that the synthesized techniques work well on subjects with multiple faults. Conclusion: We conclude that the proposed framework has a significant and positive effect on improving the effectiveness of the corresponding base techniques. (C) 2012 Elsevier B.V. All rights reserved.

关键词： J2ME   push注册机制   移动应用程序   注册   激活  

摘要： 目前传统的应用程序一般都采用PULL方式运行,即要通过用户手动来启动应用程序,而在一些特定情况下,PULL方式并不能实现人们所需要的某些功能,这时要采用PUSH方式来运行程序,即让程序自动启动运行。文章主要研究的就是在J2ME平台下,通过PUSH注册机制来使得移动应用程序自启动运行。首先对PUSH技术进行简单介绍,然后对于在J2ME平台下使用PUSH注册机制的过程进行详细研究,最后开发设计了一个运行在JAVA手机上的MIDlet应用程序用来验证PUSH注册机制在实际程序开发中的应用。

关键词： 程序设计   项目教学法   教学改革  

摘要： Java语言程序设计是一门培养学生软件开发能力的重要课程。目前,很多高职的程序设计课程都设置Java语言,但在教学过程中会出现学生编程能力较差等问题,因此,有必要对其进行改革。在多年的Java教学过程中,我们进行项目教学后,实践证明学生学习主动性、编程技能等都大大提高,更好地适应了企业的需求。

关键词： 项目化教学   传统教学   比较  

摘要： 介绍了项目化教学的定义与项目化教学的特点,以java程序设计课程的项目化教学为例,从教学主体、能力培养、知识传授方式和教学设计等四个方面对项目化教学与传统教学进行比较.项目化教学以学生为教学主体,教师为教学主导,以项目任务为中心,教学设计具体、实用、灵活,对学生"授之以渔",注重培养学生的能力,较传统教学有显著的优越性.

关键词： 优化   Java   可扩展性  

摘要： 本文介绍了Java代码优化的过程,总结了优化Java程序的一些最佳实践,分析了进行优化的方法并解释了性能提升的原因。从多个角度分析导致性能低的原因并逐个进行优化使得程序性能得到极大提升,代码可读性、可扩展性更强。、

关键词： JAVA   安全性  

摘要： 应用程序安全是一个综合性的课题,它需要在权衡各方面的因素之后,再作出安全策略。首先分析了Java平台自身的安全机制,包括它的安全策略、认证和授权,之后分析Java应用程序中的一些缺陷和不足,并提出相应的改进方法。

ISBN: (纸本)9787115309396