avl tree and bplus tree

This method was made to convert special characters from a String to HTML codification.

将笛卡尔坐标系上的点定义为一个服务类Point，Point类提供求得坐标系上两点 间距离的功能、获取和设置坐标的功能、获取极坐标的功能，和完成对已创建的 Point类对象统计功能。设计测试Point服务类的应用程序主类，测试并显示输出 提供功能的结果。 (求以点(1,1)为极坐标原点，点(5,5)的极坐标) -Will be a point on the Cartesian coordinate system is defined as a service class Point, Point class provides coordinates obtained on the function of the distance between two points, access and set coordinates, polar coordinates to obtain functions, and the completion of the Point that have been created class object statistical functions. Design Test Point service class application" s main class to provide functionality to test and display the output results. (Seeking to point (1,1) to polar coordinates origin point (5,5) in polar coordinates)

我是初学者，刚刚编了个小东西，java的，有兴趣可以看看哈-I am a beginner, just编了个small things, java, and who are interested can look at the Kazakhstan

用Java实现的23个常用设计模式源代码-Java achieve 23 commonly used design patterns source code

JAVA数字图像处理，获取图像Miss.jpg的象素，保存在一个数组中！同时可以获得图像的RGB值和Alpha值。-JAVA Digital Image Processing, access Miss.jpg pixel image, stored in an array! At the same time, the image can be RGB values and Alpha value.

贪食蛇的另一种实现- Has a greedy appetite the snake another kind to realize

希望批准，谢谢站长-Wished to approve, thank head

很有趣的著名游戏Hangman，其实就是猜英语单词，不过我的数据源取得是所有英语国家的名字列表，随机选取，很丰富很有趣。-Very interesting well-known game Hangman, is actually a guess English words, but I get the data source is the name of all the English-speaking countries, a list of randomly selected, it is rich in very interesting.

java 对日期的操作，日期类型数据的加减等-java on the date of operation, the date of the type of data, such as addition and subtraction

很好玩的五子棋游戏，跟普通的五子棋游戏略有不同，具体请打开文件夹。附java源代码-Gobang a very fun game, with the general welcome to play a slightly different, specific, open the folder. Attached java source code