Hi, What you are trying to achieve is based on the reflection capabilities of Java and mainly the class java.lang.Class. (See http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Class.html)
To describe it shortly: a) use static method forName: Class.forName(yourClassName) b) then use reflection on the object of class Class that will be returned: class.getConstructors() to get the constructor you need c) read http://download.oracle.com/javase/tutorial/reflect/class/index.html and http://download.oracle.com/javase/tutorial/reflect/member/index.html to discover the next steps. This is fully possible as App Engine gives access to the reflection API of Java. I personnally use this API on GAE. regards didier On Dec 14, 10:41 pm, Abdel_eid <a.eid.1...@gmail.com> wrote: > Dear All , > I am working on a project in which the user enters the class name > and data that he needs to add to the data store but i faced a big > problem , i had successfully read the data from the user and checked > it's correctness but i am trying to open a new instance of the class > send by the user in the form of String > > for example String class_name = "Student"; > String final_class_name = package_name + class_name; > > so how can i open an object of that sent class and also send the > caught variables to it's constructor > N.B i don't know how many classes i had or there name to check it with > ( instance of ) > > Thanks for your attention -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
