Getting xml response from java web service client

I have web service written in java. I am trying to create a web service client in java. I can call my web service from my client and can run my service's functions, but response's just a text/string. I mean when my function is int a+int b, my response is just a+b. I think eclipse is converting this responses xml to string or text, actually I don't know. I am new at web service topics. Can you help me about how can I get an xml response on java web service client on eclipse?