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Editorial Team
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Asked: 2026-05-27T17:08:03+00:00

I have been stuck in quite awkward situation in my program. The case is

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I have been stuck in quite awkward situation in my program.
The case is that… my project is having some A.jar file in classpath which packs many important utility classes..but this A.jar is quite old file and we cant replace this as we are not sure how and what importance it holds….
Now, i need the method request.setCharacterencoding() & response.setCharacterEncoding from ServletResponse I/F but this A.jar contains the old version of ServletResponse and due to which I am not getting the above two methods.. Now i have introduced new servlet-api.jar in classpath but still my project is taking the reference of servletResponse class from A.jar and not from new servlet-api.jar.

Can you guys, please suggest me a way to get the reference of new servletResponse from servlet-api.jar rather than A.jar

(P.s. : I can not remove/modify the A.jar)

Thanks…

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1 Answer

  1. Editorial Team

    When you run the jar file, make the classpath reflect the order of the jars you want loaded. Let me know if you need to exact syntax, but in general, if you have CLASSPATH=patch16.jar:patch15.jar:patch14.jar:… etc, it will load the first matching copy of the class, starting with patch16.jar then patch15.jar etc.

    More info on exact syntax:
    http://javarevisited.blogspot.com/2011/01/how-classpath-work-in-java.html

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