1.Both projects are based-on Eclipse platform;

2.When you want to run lexical analyzer,you can goto the catalog of cifafenxi and double-click on the JAR file to see the result;
In this catalog,you can see the javadoc in the catalog of doc;

3.In the catalog of regtest,there is a test program on regular expression;

4.if you want to the modify these programs,you can open myeclipse and then  click the right-hand button which will list a menu and choose the
import option,then,you choose general-->existing projects-->next,after that you click the button of browser and find the project name such as regtest which you want to debug,that's OK;