20CN网络安全小组论坛 - 编程破解

论坛: 编程破解标题: JavaLeaner

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作者: Javapro [helper]

论坛用户

请问谁在用Java?

地主发表时间: 10/12 18:58

回复: Javapro [helper]

论坛用户

Java名称的三重意思。

Java这个名字来源于在Sun公司窗外一棵树的名字。
其二是现在和将来将广泛使用的一种面向对象编程语言的名字。
其三是Java是一个平台，像操作系统平台、硬件平台等一样概念的平台，在这个平台上可以实现Java语言的作用和特点。

[此贴被 Javapro(helper) 在 10月12日19时53分编辑过]

B1层发表时间: 10/12 19:10

回复: Javapro [helper]

论坛用户

怎样在自己的电脑上实现Java平台和编程？

直接在Sun公司的网站（www.sun.com)上下载Java2 SDK安装就行了。
但你的电脑要具备基本的配置，CPU最低是P1.66 内存80M。HDD：300M。

B2层发表时间: 10/12 19:22

回复: Javapro [helper]

论坛用户

这个开发工具不像Visual Studio一样，具有可视化效果。
编译和运行的工作都是在DOS窗口下用命令做的。
一开始不很容易适应。

[此贴被 Javapro(helper) 在 10月12日19时03分编辑过]

B3层发表时间: 10/12 19:28

回复: Javapro [helper]

论坛用户

Sun公司官方网站对Java的介绍

How Will Java Technology Change My Life?
We can't promise you fame, fortune, or even a job if you learn the Java programming language. Still, it is likely to make your programs better and requires less effort than other languages. We believe that Java technology will help you do the following:

1。Get started quickly: Although the Java programming language is a powerful object-oriented language, it's easy to learn, especially for programmers already familiar with C or C++.
Write less code: Comparisons of program metrics (class counts, method counts, and so on) suggest that a program written in the Java programming language can be four times smaller than the same program in C++.

2。Write better code: The Java programming language encourages good coding practices, and its garbage collection helps you avoid memory leaks. Its object orientation, its JavaBeans component architecture, and its wide-ranging, easily extendible API let you reuse other people's tested code and introduce fewer bugs.

3。Develop programs more quickly: Your development time may be as much as twice as fast versus writing the same program in C++. Why? You write fewer lines of code and it is a simpler programming language than C++.

4。Avoid platform dependencies with 100% Pure Java: You can keep your program portable by avoiding the use of libraries written in other languages. The 100% Pure JavaTM Product Certification Program has a repository of historical process manuals, white papers, brochures, and similar materials online.

5。Write once, run anywhere: Because 100% Pure Java programs are compiled into machine-independent bytecodes, they run consistently on any Java platform.

6。Distribute software more easily: You can upgrade applets easily from a central server. Applets take advantage of the feature of allowing new classes to be loaded "on the fly," without recompiling the entire program.

[此贴被 Javapro(helper) 在 10月12日19时43分编辑过]

B4层发表时间: 10/12 19:34

回复: Javapro [helper]

论坛用户

大家都知道C语言是贝尔实验室的Dennis Ritchie从B语言发展而来的。
关于Java是在Sun公司的James Gosling 在给公司开发一个软件的时候因为用的是C和C＋＋语言，而这个语言在开发公司特定的软件的时候很不适用，自然被发展出来的就是Java。

B5层发表时间: 10/12 19:51

回复: Javapro [helper]

论坛用户

对于Sun公司大家不能不知道就是 Sun Microsystems, Inc
一打开主页就能看道明显的标题：We make the net work
看看Sun公司的Vision

Sun Vision
Since its inception in 1982, a singular vision - The Network is The Computer - has propelled Sun Microsystems, Inc. (Nasdaq: SUNW) to its position as a leading provider of industrial-strength hardware, software, and services that make the Net work. Sun can be found in more than 100 countries and on the World Wide Web.

中文含义是

Sun 的观点
自 Sun Microsystems, Inc. (Nasdaq: SUNW) 在 1982 成立之初起，Sun 所持的一个观点 - 网络就是计算机[tm] - 已促使 Sun 成为启用网络的工业用硬件、软件和服务的领先供应商。在 170 多个国家和万维网上均可以找到 Sun 的身影。

B6层发表时间: 10/12 19:56

回复: Javapro [helper]

论坛用户

我们要认识Java、支持Java、用Java，将来10年内处处将看到Java的身影。

B7层发表时间: 10/12 20:04

回复: Javapro [helper]

论坛用户