Eclipse tool not building

The build process should generate some error messages, stack traces etc.
Can you please post those messages.

It was showing error red mark on all the projects.

Did you check if you got the right JRE version for you projects?
Perhaps it would be a good idea to run the build process and post the corresponding output.

It is not finding the build path. Saying Arraylist not found etc. All the jars are in build path.

Description      Resource      Path      Location      Type
ArrayList cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 55      JSP Problem
ArrayList cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 56      JSP Problem
ArrayList cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 69      JSP Problem


Description      Resource      Path      Location      Type
Hashtable cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 88      JSP Problem
Hashtable cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 88      JSP Problem
Hashtable cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 92      JSP Problem
Hashtable cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 92      JSP Problem


Description      Resource      Path      Location      Type
SqlDisplayColumn cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 102      JSP Problem
SqlDisplayColumn cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 105      JSP Problem
SqlDisplayColumn cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 131      JSP Problem
SqlDisplayColumn cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 134      JSP Problem
SqlDisplayColumn cannot be resolved to a type      usercustxrefmaintrenderer.jsp      /NewDirAdmin/WebContent/usercustxrefmaint      line 139      JSP Problem

etc.......

Also i have a big head ache dragging since one week. I have text files being imported into jsp's using <@include. All the jsp's are displaying error. I am not able to build a war and deploy on the server. A gentleman on the EE adviced to disable jsp editor and open them in text editor. I am not aware of how to disable the jsp editor

I am not able to resolve this jsp issue since one week. All the methods are in text file and he is importing the text file into jsp and using the methods in the jsp. All The jsp's is showing errors.