classloader question - same classes in 2 different jar files

Hi, i have a question about classloader:

I have few classes, for some reason, I have to put these classes in 2 different jar files, and both jar file will be in my class path. Will this cause any classloader problem? or any other problems?

e.g.:

I have
a.class, b.class, c.class.....z.class

I have to put above to both 1.jar and 2.jar

My class path is C:\lib\1.jar;c:\2.jar;c:\3.jar....

Will this cause any problems?

Thanks !!!

Is the package the same?

If not than the only thing that you will have to do is, provide the fully qualified package name when declaring variables. ie

Code:

---


ResultSet myResultSet = myStatement.executeQuery("SELECT * FROM SomeTable");

java.util.Date utilDate = new java.util.Date();

java.sql.Date sqlDate = myResultSet.getDate(1);

---

Notice that the package is specified (java.util and java.sql)

If the packages are the same, than you will run into problems

Yes, packages are the same.... what kind of problem I will run into?

Thanks.

I don't think that you will actually get errors, but the VM (Virtual Machine) will pick up the class it finds in the classpath first.

ie if your classpath is something like:

Test1.jar;Test2.jar

Where Test1.jar has the same classes and packages as Test2.jar, the VM will pick to the classes in Test1.jar and not Test2.jar.

I could be rong, I never tried it.

Yes, this is what I thought

i'd love to know why you need to put identical classes in 2 different jar files, and use both jars in your app. it sounds like your filesystem structuring could do with some re-thinking