eclipse content assist settings

How do I enable the eclipse setting that shows a dropdown list of 开发者_开发百科available methods when typing code. For example if I type the name of an array list it should show me the available methods. I used to have that feature but somehow it got turned off.

You might want to check

Windows > Preference > Java > Content assist

for content assist setting, and

Windows > Preference > General > keys (search 'content assist')

for key mapping

Path might be different if you are not using Helios (3.6)