毕业设计外文资料翻译_文献英文原文

毕业设计外文资料

题目面对对象技术

学院信息科学与工程学院

专业计算机科学与技术

班级计软1202

学生刘桂斌

学号20121214073

指导教师史桂娴，王海燕

二〇一六年三月二十日

Object Technology2004, Vol.14 (2), pp.20.

Object Technology

Timothy A.Budd

Abstract Object technology is a new approach to developing software that allows programmers to create objects, a combination of data and program instructions. This new technology has been steadily developed since the late 1960s and promises to be one of the major ingredients in the response to the ongoing software crisis.

Keywords Object technology Optimization

1.1 Introduction to OT

There exists a critical technology that is changing the way we conceive, build, use and evolve our computer systems. It is a technology that many companies are adopting to increase their efficiency, reduce costs and adapt to a dynamic marketplace. It is called Object Technology (OT).

By allowing the integration of disparate and non compatible source, OT has the potential to precipitate a revolution in information systems design on a par with that caused in computer hardware by the introduction of the computer chip. Yet OT is not a new

phenomenon. Development and product releases have been ongoing since its origin many years ago. However, the recent emphasis task of enterprise information technology integration has brought OT into the spotlight.

OT promises to provide component-level software objects that can be quickly combined to build new applications that respond to changing business conditions. Once used, objects may be reused in other applications, lowering development costs and speeding up the development process. Because objects communicate by sending messages that can be understood by other objects, large integrated systems are easier to assemble.

Each object is responsible for a specific function within either an application or a distributed system. That means that as the business changes, individual object may be easily upgraded, augmented or replaced, leaving the rest of the system untouched. This directly reduces the cost of maintenance and the timing and extendibility of new systems.

1.2 OT-based Products

The current market for OT-based products can be divided into four major segments: ·Languages and programming tools

·Developers’ toolkits

·Object-Oriented database

·Object-Oriented CASE tools

The largest segment of the current market for OT-based products is languages and

programming tools. Products in this area include language compliers for C++, Smalltalk, Common Lisp Object System (CLOS), Eiffel, Ada and Objective-C, as well as extensions to PASCAL and Modula-2.

Products in this category are available from a variety of vendors. Increasingly, the trend in this group is to offer the language compliers with associated development tools as part of a complete development environment.

Developers’ toolkits account for the next largest part of the OT market. These products are designed to develop a program that enables a developer to easily do one of two things. The first is interfacing an application to distributed environment. The second is developing a graphical screen through a product.

By providing developers with higher level description language and reusable

components, products in this category give developers an easy and cost effective way to begin producing object-oriented systems.

An important component in this category is the relatively new area of end-users tools. This element is important because organizing and analying the increasingly large amounts of data that computer systems are capable of collecting is a key problem.

Object-oriented database management systems are one of the most interesting and rapidly growing segments of the OT market. A number of companies, including systems vendors like Digital and HP, and start-ups such as Object Design, Servio, and Objectivity, have all produced products.

These products, dubbed ‖Objectbases‖, fill an important need by storing complex

objects as a single entity. The objectbase products allow objects to be stored, retrieved and shared in much the same way as data is stored in a relational database management system. The value of an objectbase, as opposed to a database, is best described as following: ―Object databases offer a better way to store objects because they provide all of the traditional database services without the overhead of disassembling and reassembling