How to change your name on minecraft java?
I’ve checked mojang help and still don’t know how to change my gamertag on minecraft java edition.
The answer to your question - how to change your name on Minecraft Java is -
On Java Edition, you can change your name by going to your Mojang account and clicking the "Change" button next to your current username.
To change your XBox gamertag, go to your XBox account through Microsoft, click the Customize option, then change your gamertag.