java - Moving an extended class from jar to application -

i have interface , 2 classes below. skeletoninterface , skeletonparent auto generated. 3 files resides in jar file, deployed web project under web-inf/lib. have requirement move skeletenchild jar web project. ran issues when tried that. how can expose/access implementation class in web project?

// auto generated interface public interface skeletoninterface{     public int foo(int i){     } }  // auto generated class public class skeletenparent implements skeletoninterface {     public int foo(int i){         // not implement here      } }  // actual implementation class public class skeletenchild extends skeletenparent{     @override     public int foo(int i){         // want implement here     } }