通过分析面对对象程序及其判分规则的特点，提出了一种基于反射机制、一class文件为评判对象、判分项为基本评判单元的Java编程题自动判分技术。-By analyzing the object-oriented program and its sub-sub rule, this paper proposes an approach based on reflection, a class file for the evaluation object, judge sentenced a breakdown of the basic unit of an automatic sentence of the Java programming technology.