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help: class conflict in two different version JAR files

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I am using Eclipse. Project A uses 3rdparty.1.0.1.jar file; Project B uses 3rdparty.1.0.3.jar file. Project B depends on Project A.

I am working on Project B. I am not supposed to change anything in Project A. I hope that the code in B always use the class inside 3rdparty.1.0.3.jar. I don't know how to do that. I found that for the classes in 3rdpartyxx.jar, the code in B just use the class in 3rdparty.1.0.1.jar file, which is used by A. I guess since B depends on A, so 3rdparty.1.0.1.jar file has the higher priority. This causes some problem, which I just omit here.

If running by ANT on the command line, due to the way I set up(project A's code listed near the end of the Java classpath), the code in B uses the classes in 3rdparty.1.0.3.jar and the problem was avoided.

I hope to solve the problem in Eclipse. Thank you for your help.

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help: class conflict in two different version JAR files zyng <xsli2@yahoo.com> - 2013-03-20 07:34 -0700
  Re: help: class conflict in two different version JAR files zyng <xsli2@yahoo.com> - 2013-03-20 07:50 -0700
    Re: help: class conflict in two different version JAR files Lew <lewbloch@gmail.com> - 2013-03-20 12:16 -0700
  Re: help: class conflict in two different version JAR files Lew <lewbloch@gmail.com> - 2013-03-20 12:14 -0700
  Re: help: class conflict in two different version JAR files Arne Vajhøj <arne@vajhoej.dk> - 2013-03-20 22:11 -0400
  Re: help: class conflict in two different version JAR files Roedy Green <see_website@mindprod.com.invalid> - 2013-03-20 20:32 -0700

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