How to turn off the Javadoc hover

Preferences / Java / Editor / Hover

1. untick the "Combined Hover" option: no more popup.

Then you would have:

• Shift+F2: open the external javadoc if javadoc archive or directory has been associated with your project (and if some javadoc has been generated)

• Alt+Shift+Q, followed by J: open the javadoc view, with the same content than the popup previously seen on mouse hovering.

2. or check Javadoc option but specify a modifier key for it (in the edit box below). In the latter case javadoc hover would only appear if you hold that key.