# Openvidu-java-client API - openVidu Instance not initializing

**URL:** <https://openvidu.discourse.group/t/openvidu-java-client-api-openvidu-instance-not-initializing/1549>\
**Category:** Issues developing apps\
**Tags:** v2\
**Created:** [July 21, 2020, 4:04pm UTC](https://openvidu.discourse.group/t/openvidu-java-client-api-openvidu-instance-not-initializing/1549 "2020-07-21T16:04:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tanvir\_Rahman](https://yyz2.discourse-cdn.com/free1/user_avatar/openvidu.discourse.group/tanvir_rahman/32/745_2.png) [@Tanvir\_Rahman](https://openvidu.discourse.group/u/Tanvir_Rahman)\
**Post date:** [July 21, 2020, 4:05pm UTC](https://openvidu.discourse.group/t/openvidu-java-client-api-openvidu-instance-not-initializing/1549/1 "2020-07-21T16:05:00Z")

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Hi,  
i am trying to integrate Openvidu-js-java in my Project. whenever i am trying to create session for getting a valid token from openvidu-server by using openvidu-java-client , Null pointer Exception is showing. it shows the openvidu instances is null when its trying to access the create session method ex. Session session = this.openVidu.createSession();

i have already instantiate openvidu in the constructor. By following :  
this.openVidu = new OpenVidu(OPENVIDU\_URL, SECRET);

My openvidu\_url is a Public accessible IP where my instance of OpenVidu Server is up an running. I dont know what could be the problem that the openvidu instance is not intilaizing and showing null.

if anyone give me some closure regarding this issue it would be a great help.  
Thank you.

 ![Screenshot from 2020-07-21 21-59-47](https://global.discourse-cdn.com/free1/uploads/openvidu/original/1X/81ea61ef0d74152034281f7b1d5ffcffe026efc4.jpeg)

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**Author:** ![micael.gallego](https://yyz2.discourse-cdn.com/free1/user_avatar/openvidu.discourse.group/micael.gallego/32/2_2.png) [@micael.gallego](https://openvidu.discourse.group/u/micael.gallego)\
**Post date:** [July 27, 2020, 11:50am UTC](https://openvidu.discourse.group/t/openvidu-java-client-api-openvidu-instance-not-initializing/1549/2 "2020-07-27T11:50:27Z")

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Use a working tutorial app and start modifying it.