You will find much information about JavaDoc at the Documentation Comment Specification for the Standard Doclet, including the information on the

{@link module/package.class#member label}

tag (that you are looking for). The corresponding example from the documentation is as follows

For example, here is a comment that refers to the getComponentAt(int, int) method:

Use the {@link #getComponentAt(int, int) getComponentAt} method.

The module/package.class part can be ommited if the referred method is in the current class.

Other useful links about JavaDoc are:

  • JDK 17 Tool Specifications – The javadoc Command
  • JavaDoc Guide
  • How to Write Doc Comments for the Javadoc Tool