Principles and Practice of Programming in Java最新文献_第10页

The potential of speculative class-loading 投机性类加载的可能性

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294354

Dmitrijs Zaparanuks, M. Jovic, Matthias Hauswirth

引用次数: 1

A Java mobile-enabled environment to access adaptive services 支持Java移动设备的环境，用于访问自适应服务

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294361

S. Ceriani, C. Raibulet, Luigi Ubezio

引用次数: 3

Towards intelligent analysis techniques for object pretenuring 面向对象伪装的智能分析技术

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294353

Jeremy Singer, Gavin Brown, M. Luján, I. Watson

引用次数: 18

The design of a Java phone programming environment 设计了一个Java手机编程环境

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294330

R. Cook

引用次数: 3

Array bounds check elimination for the Java HotSpot#8482; client compiler Java热点#8482的数组边界检查消除客户机编译器

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294343

Thomas Würthinger, Christian Wimmer, H. Mössenböck

{"title":"Array bounds check elimination for the Java HotSpot#8482; client compiler","authors":"Thomas Würthinger, Christian Wimmer, H. Mössenböck","doi":"10.1145/1294325.1294343","DOIUrl":"https://doi.org/10.1145/1294325.1294343","url":null,"abstract":"Whenever an array element is accessed, Java virtual machines execute a compare instruction to ensure that the index value is within the valid bounds. This reduces the execution speed of Java programs. Array bounds check elimination identifies situations in which such checks are redundant and can be removed. We present an array bounds check elimination algorithm for the Java HotSpot#8482; VM based on static analysis in the just-in-time compiler.\u0000 The algorithm works on an intermediate representation in static single assignment form and maintains conditions for index expressions. It fully removes bounds checks if it can be proven that they never fail. Whenever possible, it moves bounds checks out of loops. The static number of checks remains the same, but a check inside a loop is likely to be executed more often. If such a check fails, the executing program falls back to interpreted mode, avoiding the problem that an exception is thrown at the wrong place.\u0000 The evaluation shows a speedup near to the theoretical maximum for the scientific SciMark benchmark suite (40% on average). The algorithm also improves the execution speed for the SPECjvm98 benchmark suite (2% on average, 12% maximum).","PeriodicalId":169989,"journal":{"name":"Principles and Practice of Programming in Java","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128577832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 56

A DSL approach for object memory management of small devices 小型设备对象内存管理的DSL方法

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294346

K. Marquet, G. Grimaud

引用次数: 5

Redundant boxing elimination by a dynamic compiler for Java 由Java动态编译器消除冗余装箱

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294355

Y. Chiba

引用次数: 9

Extending and contributing to an open source web-based system for the assessment of programming problems 扩展和贡献一个开源的基于web的系统来评估编程问题

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294327

O. Gotel, C. Scharff, A. Wildenberg

{"title":"Extending and contributing to an open source web-based system for the assessment of programming problems","authors":"O. Gotel, C. Scharff, A. Wildenberg","doi":"10.1145/1294325.1294327","DOIUrl":"https://doi.org/10.1145/1294325.1294327","url":null,"abstract":"This paper describes the development of a web-based programming and assessment environment for use in supporting programming fundamentals courses (CS1, CS2) taught in Java. This environment is currently linked with WeBWorK, an open source web-based system developed at the University of Rochester that is popular for administering and assessing mathematics and physics coursework, but is designed for the potential integration with other course management system (CMS) environments. In addition to the traditional multiple-choice and short answer questions that have been augmented with the extensive randomization and customization routines of WeBWorK, this new environment (called WeBWorK-JAG where JAG stands for Java Auto Grader) can automatically collect and grade free-form program fragments written in Java. Novel pedagogy has been developed based on the capabilities of this extension and preliminary classroom results are discussed in this paper. For example, when students contributed to WeBWorK by creating WeBWorK-JAG questions for their peers, they are exposed to the reality of creating comprehensive unit tests and to the wider quality assurance aspects of formulating questions and their solution sets. This work is described in the context of an emerging commercial market for web-based programming assistants and its unique contributions are summarized.","PeriodicalId":169989,"journal":{"name":"Principles and Practice of Programming in Java","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121314567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Implementing fast JVM interpreters using Java itself 使用Java本身实现快速JVM解释器

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294345

Michael Bebenita, A. Gal, M. Franz

引用次数: 2

A software metric for coherence of class roles in Java programs Java程序中类角色一致性的软件度量

Principles and Practice of Programming in Java Pub Date : 2007-09-05 DOI: 10.1145/1294325.1294333

S. Mäkelä, V. Leppänen

{"title":"A software metric for coherence of class roles in Java programs","authors":"S. Mäkelä, V. Leppänen","doi":"10.1145/1294325.1294333","DOIUrl":"https://doi.org/10.1145/1294325.1294333","url":null,"abstract":"The purpose of software metrics is to measure the quality of programs. The results can be for example used to predict maintenance costs or improve code quality. An emerging view is that if software metrics are going to be used to improve quality, they must help in finding code that should be refactored. Often refactoring or applying a design pattern is related to the role of the class to be refactored. In client-based metrics, a project gives the class a context. These metrics measure, how a class is used by other classes in the context. We present a new client-based metric LCIC (Lack of Coherence in Clients), which analyses, if the class being measured has a coherent set of roles in the program. Interfaces represent the roles of classes. If a class does not have a coherent set of roles, it should be refactored, or a new interface should be defined for the class.\u0000 We have implemented a tool for measuring the metric LCIC for Java projects in the Eclipse environment. We calculated LCIC values for classes of several open source projects. We compare these results with results of other related metrics, and inspect the measured classes to find out, what kind of refactorings are needed. We also analyse the relation of different design patterns and refactorings to our metric. Our experiments reveal the usefulness of client-based metrics to improve the quality of code.","PeriodicalId":169989,"journal":{"name":"Principles and Practice of Programming in Java","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127895976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7