Hippie Completion in Eclipse is a very similar Emacs (a very famous editor under UNIX / Linux) (even the name is from EMACS). The main manifestation of this feature is: But you press ALT- / time in a place in the editor, the editor will make a blur match lookup in the current editing buffer, select the most fit one, insert into your editor . . Eclipse did not give a very detailed way of use, but if you are Ctrl-Shift-L in the editor, you will look at the big quick shortcut list, which lists Hippie Completion. This feature can be seen from this Request for Enhancement in Eclipse (some people have entered the need, and then implemented in some versions).
Try to do this: collect mycol = new col [press alt- /], you will see that Eclipse automatically makes Collection. After defining mycol, anywhere, but you use mycol, type MYC and Alt - /, Eclipse will automatically make MYCOL.
