Firebase Cloud Messaging notification from Java instead of Firebase Console

Question

I am new to Firebase and I am running into errors such as mismatch sender id and Authentication Error with HTTP status 401 when my Java application tries to send a notificat

Answer 1

Use this sending push notifications from java.

Spring Framework

Compared to other projects there are just 3 simple classes with minimal dependencies.

https://github.com/AndreiD/testingpushnotifications

Remember to replace the SERVER_API_KEY and the Client_Token.