一个java源代码包，其中包括快速排序，队列和后缀表达式的计算，XML生成程序，为一个解析XML文件程序做了书价格的计算，是后缀表达式计算，中缀转后缀-A java source code package, including the quick sort, queue and the suffix for calculating expressions, XML generation process, a procedure to resolve XML document has done a book prices is the suffix expression calculated infix to suffix