100个用Java编写的简单程序，适合Java初学者学习。还包括哈希表操作，矢量操作，数组数据操作的讲述。-100 with a simple program written in Java, it is suitable for Java beginners to learn.Also includes the hash table operations, vector operations, the array of data about the operation.

该程序是对shp矢量格式数据的读取。采用java语言编写。-The program is the reading of the shp vector format data. Using java language.

数据块的编解码部分和矢量求逆的测试部分，内含各种相关编码类。-The encoding and decoding part of the data block and the part of the vector inversion test, including all kinds of relevant coding class.