赵帮辉中英文翻译(6)

Java's birth challenges the traditional computer models, computer software development and software industries have had a profound impact:

(1) software 4A objectives and requirements of the software can reach any person in any place at any time for any electronic device can be applied. This software platform can meet each other in operation, with the scalability and reusability of the distributed computing model can be plug and play needs.

(2) Construction of the development approach based on the rise, leads to the CORBA architecture and the international standard software framework for multi-application system. Based on this platform and formed Java.2. NET platform, the two major factions, and promote the entire IT industry.

(3) of the software industry and industrial enterprises have had a profound impact on software development from the center shifted to a service center. Intermediate providers, component providers, server software and consulting service providers appear. Businesses must reinvent themselves, B2B e-commerce will drive the new economy, markets, giving enterprises new value, new growth, new business opportunities, new management.

(4) software development has brought a new revolution, emphasis on integration with third-party components, using the platform of infrastructure services, achieving various stages of development of important technologies, attention to the development team, organizational and cultural ideas, collaboration, creativity, responsibility, Credibility is the basic quality of human resources.

In short, the current Java to see the importance of the information age, the future will continue to develop, Java applications will be in a more promising future. 1.1 Java language development 1.1.1 Java language generation

The early 90s of last century, Sun companies, in a smart device for future programming language, the language should have some new features, in order to avoid some deficiencies of C + +.

The language originally named Oak, Gosling from the Office of the language of the oak tree outside the window (Oak). Later in the conflict when it came up, so to think of hot coffee from the hands of a rich coffee to the islands of Indonesia, the Chinese name of Java, Java language name here.

With the rapid development of Internet, Web application is becoming more widespread, Java language has also been developing rapidly. In 1994, Gosling Java developers with a real-time high, reliable, safe, interactive features of the new Web browser, it does not depend on any hardware platform and software platform. The browser name is HotJava, and in 1995 together with the Java language, officially released to the industry, caused a great sensation, Java attendant position was reaffirmed. After moving very quickly.

Java programming language and syntax similar to C + + syntax, semantics and Small Talk TM is the semantic similarity. Java programming language can be any conventional programming language used to create applications that can be created. Java programming language, designed the main objectives are:

? provide an easy programming language, thereby eliminating the other languages such as pointer arithmetic and memory management of the robustness of the defects.

? use of object-oriented concepts to make the program truly become a fully object-oriented programming.

? To make the code clear and reasonable as possible, provide a concise and smooth way.

? For the following two points provide an interpretation of environmental benefits: Improve the development speed to eliminate compile ─ ─ ─ Links - load - test cycle; ─ ─ portability code so that the operating system runtime environment for system-level calls to do.

? to run more than one active thread of the program provides a way.

? module by allowing the download code to run when the program can also change the dynamic support programs.

? To ensure the safety of those who load the code module which provides a screening method.

Well-developed Java core technology for these goals to provide a guarantee, including the following main technologies:

? Java Virtual Machine

? Automatic garbage collection ? Security Code

1.1.2 Java language development

Java language development goals is not just a programming language, but also to build a development environment, an application environment, a deployment environment. As the most basic support for Java language, Sun released in 1996, Java Development Kit JDK 1.0 (JDK is the Java Develop Kit for short), including the need for Java developers of various utility programs (compilation, execution, documentation generators, etc.), basic class library (equivalent to C language library and C + + class library), instances and so on. In 1998, Sun has released an updated JDK 1.2, because the thinking in technology, many improvements with the previous, so the next Java technology is generally known as Java 2. Subsequently, the characteristics of different areas, Java technology is divided into three different platforms (the latest title has removed the ambiguous meaning of 2, such as JavaSE):

? J2SE - Java Platform Standard

J2SE is the standard version of Java language, refers to the JDK (1.2 and later versions), including the Java Foundation Class Library and grammar. It is used to develop rich GUI (graphical user interface), complex logic and high-performance desktop applications. ? J2EE - Enterprise Java platform

Built on top of J2EE J2SE for the development and implementation of enterprise applications. It is a standard multi-tier architecture, enterprise applications can be divided into client layer, presentation layer, business layer and data layer, mainly for developing and deploying distributed, component- …… 此处隐藏：7928字，全部文档内容请下载后查看。喜欢就下载吧 ……