My problem is that the content assist window won\'t pop up after clicking Ctrl + Space. I checked my shortcuts and the content assist is bound to Ctrl + S
To enable Ctrl+Space.
Go to Control Panel --> Region and Language --> select Keyboard and Languages tab --> Change Keyboard button --> select General tab --> Under Installed Services --> Remove all languages except English(United States). click apply and ok.
Eclipse --> Windows --> Preferences --> Java --> Editor --> Content Assist --> Advanced --> select all Java & Java Type Proposals.
Eclipse --> Windows --> Preferences --> General keys --> Type Content Assist in right side search box --> Select command Content Assist --> click on Restore To Default --> Apply --> ok
Now you are ready to use ctrl + space feature for content assist.