Java hint----This element have no attached source and the Javadoc could not being found in the attached Javadoc

This element have no attached source and the Javadoc could not being found in the attached Javadoc.

Note: This element has no additional source code and cannot find Javadoc in the attached Javadoc. 】

Workaround:

When using eclipse, when you move the code with the mouse, especially when the mouse moves to the method name, it will automatically pop up a message bar near the mouse, which says the method is defined in which class, and the type of the method, comments.

Open eclipse today to find the mouse hover over a system class will not pop up these hints, and give the following tips:

Note:this element have no attached source and the Javadoc could not being found in the attached Javadoc

How to solve this problem?

In the main menu bar, select "Window"--"Preferences" submenu;
In "General"--"Editors"---> "File associations";
In the right "File types" point "Add ..." button in the Pop-up dialog box, enter the *.doc suffix, click OK.

Of course, if some friends have a sudden pop-up window interferes with the line of sight also affect the idea, the closing method is as follows:

Window->preferences (Preferences)->java->editor (editor)->hovers (hover hint) cancels [Combined Hover] (combined hover hint).

Java hint----This element have no attached source and the Javadoc could not being found in the attached Javadoc