I m working with executable jar files

i hava folder E:a which has Test.java and its .class files,
in E:b i have two classes Employee.java and student.java and there .class files are E:C which contains folder structure as comemp ,comstd
i have created a txt file in E:a Main.txt which has Main-class: Test for manifest files
now when i run jar -cvfm app.jar Main.txt e:c to contains files at e:c location in jar file , inside my jar files folder structure is created like Ccomemp Ccomstd so when i try to run this jar file using java -jar app.jar it is unable to find .class files of employee and student

it should execute jar file app.jar