jdk1.6

[philip johnson]

Hi
I am start using jdk1.6 , could someone explain this code.

   
public static <T extends BaseEntity> T getById(Collection<T> entities,
			Class<T> entityClass, int entityId)
 

This is taken from spring sample.
or where I can find little bit explanation for this.

[philip johnson]

I can explain little bit more
I am getting htis compilation error

   Bound mismatch: The generic method getById(Collection<T>, Class<T>, int) of type EntityUtils is not applicable for the arguments (Collection<Book>, Class<Book>, int). The inferred type Book is not a valid substitute for the bounded parameter <T extends BaseEntity>.
my book class,
public class Book extends BaseEntity {}
 

I dont understand this , please help.

[Campbell Ritchie]

Don't know, sorry, but that isn't a specific JDK1.6 problem; it is a generics problem. Please edit your post to change the thread title.

You can try in the Java™ Tutorials, here, and here, and a very good place to look can be found if you Google for "Angelika Langer Java Generics FAQ".

[Christophe Verré]

public class Book extends BaseEntity

Is this BaseEntity the same as org.springframework.samples.petclinic.BaseEntity ?
Just in case, try this :

public class Book extends org.springframework.samples.petclinic.BaseEntity

[philip johnson]

Hi
I am creating a project like Petclinic using Spring, Hibernate, to learn this technologies.I am jumping form 1.4 to 1.6 JDK.
So i create a BaseEntity class t avoid the problem in my workbench. Still it is not good. it is showing the same compilation error, In which JDK the General Concept came.
Thanks
Philip