This code uses the FusionAuth JWT library: https://github.com/FusionAuth/fusionauth-jwt and runs through a couple of different scenarios.

• building a JWT with the 'hmac' algorithm
• building a JWT with the 'rsa' algorithm
• building a JWT with the 'hmac' algorithm but verifying additional claims
• decoding an invalid JWT with the 'hmac' algorithm

You'll need maven.

mvn compile

mvn exec:java -Dexec.mainClass="io.fusionauth.example.jwt.Hmac"

Tested on java 15.0.1

JWTs originally built by FusionAuth.