Convert following curl commands to equivalent java code

Question

I am trying to use centrify APIs

Following curl commands work properly

curl -H "X-CENTRIFY-NATIVE-CLIENT:1" -H "Content-type: application/json" -d     "{User: '*****,Version: '1.0', TenantId: ''  }"     'https://****.cellwe.samsungknox.com/Security/StartAuthentication' --dump-header     headers.txt

curl -H "X-CENTRIFY-NATIVE-CLIENT:1" -H "Content-type: application/json" -d "{TenantId: '***', SessionId: 'qyrOp_Dvg-btRLQRtjzS2n1AeE2s3tpDh1V68A3TM8Y1', MechanismId: 'tKrhMSCSkUCGzPj2C1aTg1fFrWc75XY-BOhuu63qa9k1',Action: 'Answer', Answer: '****'}"  'https://****.cellwe.samsungknox.com/security/AdvanceAuthentication' --dump-header headers.txt

curl -H "X-CENTRIFY-NATIVE-CLIENT:1" -H "Content-type: application/json" -d "{UUID:'*****'}"  -b headers.txt 'https://****.cellwe.samsungknox.com/UserMgmt/GetUserInfo'

I am not able to write the equivalent java code, because, some cookies are not transferred through request.

Please refer the following API guide as well as sample program in .net

API guide http://developer.centrify.com/site/global/documentation/api_guide/using_the_api/index.gsp

Sample Program http://community.centrify.com/t5/TechBlog/Customized-Integration-of-Centrify-User-Suite-All-About-REST/ba-p/18769