java - Eclipse：为何方法默认未显示注释，鼠标悬浮却可以看到注释呢？

Question

查看Java8中CompletableFuture.java的源码，发现thenApply方法上面没有写注释，但是将鼠标放到thenApply上面却可以看到注释，请问这是为什么呢?

Answer 1

thenApplyMethod annotations are in the interface, this is the specific implementation.

Answer 2

This is not a comment, it is a document. It was actually found in the documentation.

Answer 3

This is Java DOC. IDEs generally provide such a function (you can view it by hovering the mouse over the method)