完成计算器的加，减，乘，除的一些简单的功能

用JAVA实现的TFTP原代码不错的东西，大家可以试试，-TFTP using JAVA realize the good things in the original code, we can try,

eclipse的hibernate插件,支持eclipse2.*版本-eclipse the Apache plug-in version supports eclipse2 .*

Java Clock是个免费的嵌在HTML文档中的小应用程序，可以在你的网页上显示一个时钟，既可以显示模拟形式的时钟，还可以显示数字形式的时钟，你通过点击，进行切换。 -Java Clock is a free embedded in HTML documents to the small applications, You can show up on the website of a clock, we can simulate the form of the clock, and can display digital clock, you pass it, switching.

用java三大框架和mysql开发的网上购物系统-Using java and mysql framework for the development of three of the online shopping system

里面详细的介绍了R树的结构，详尽的描述了一个R树类-Which describes in detail the structure of R tree, detailed description of an R category tree

本代码是用java编写的,用来查找目的主机开放端口信息的源码.-the java code is used to prepare the aim to find an open port mainframe information source.

使用绘制圆弧的方法，输出一个统计图表“圆饼图”和一个“折扇”。 原始数据在数组Data中，这5个数据在圆饼图中为角度不同的扇形，各自角度的计算值分别为38、91、54、125、53，放在数组drgree中。第一个数据的扇形起始角start=0，用绿色画。第二个的起始角start=38，用蓝色画。最后一个的起始角start=308，用橙色画。 折扇的画法是：在左上角坐标（130，40），长150，宽80的椭圆区域内，从22度开始逆时针地画一个15度的扇性，再画一段15度的椭圆弧；然后交替地画扇形和圆弧。-use mapping arc method, output a statistical charts, "Yuan pie" and a "folding fans." The raw data in the array Data, this data in the five round pie for the fan perspective, the perspective of their respective values were calculated 38,91,54,125,53, on the array were drgree. No. 1 fan initial data Kok start = 0, green painted. The second start of the initial angle = 38, painted blue. A final start of the initial angle = 308, with orange painting. Folding fans of paint is : in the upper left corner coordinates (130,40), 150 long, wide oval region of 80, from 22 degrees to start painting an anti-clockwise 15 degrees fan, painting section 15 of ellipse; Then turn to the fan-shaped and painted arc.

JAVA设计模式visitor详解，电脑专卖系统源代码及详解！-JAVA Design Pattern Detailed visitor, proprietary computer systems and explain the source code!

Java写的下载文件程序-Java download file written procedures

orb implement