At common law, the right of re-entry is not alienable, assignable, or devisable.

普通法上，收回权是不可流转、转让或遗赠的。

Workflow realization base on JAVA was given, including kenel interface, main classes and workflow engine.File flow, examine and approve flow function of the system were realized based on the workflow.

实现了络税务办公系统，给出了使用JAVA语言的流的实现，包括流的核心接口类、主要类的实现以及流引擎的实现，并流基础上，实现了系统的公文流转、审批流程设置等主要办公业务。