Java api to associate a project with a custom field

I have tried for the rest api but there are api to associate a project with the custom field .

Can I get the details of the java api to associate a project to a custom field

Thanks.

What do you mean ‘associate a field to a project’?

  • Add it to a screen?
  • Configure a configuration scheme to a project-specific context?

Configure a configuration scheme to a project-specific context

Thanks