通常，软件开发环境可由环境机制和工具集构成。按功能划分，环境机制又可分为(15)；工具集也可分为贯穿整个开发过程的工具和解决软件生命周期中某一阶段问题的工具，分别属于上述两类工具的是(16)。软件开发环境的核心是(17)。软件开发环境具有集成性、开放性、(18)、数据格式一致性、风格统一的用户界面等特性，因而能大幅度提高软件生产率。

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When we announced Java 2 Micro Edition(J2ME)a few years ago, we believed that Java had an important role to play in hand held devices. Some were(71)that Java would be small enough for such limited devices.

 But no(72), Java for the small device is a success. J2ME has emerged strongly in the wireless market. Java's portability and extensibility have brought about rapid(73)in this market.

 The success of Java beyond desktop computers is significant(74)developers. Java literacy is now more important than ever, as Java is used more and more to(75)a whole range of new computing devices--not only wireless handsets but also personal digital assistants, cameras, automobiles, home control, and so on.

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