Why is my eclipse environment does not drop down list

            
Learning environment using eclipse andriod, but watching videos of them, enter the word will pop up the corresponding drop-down list, what my reaction did not only lose the hand, it is easy to mistake, and trouble, there are shortcuts that Microsoft VS can ctrl + j operation, do not know how eclipse can drop down, thank you heroes guidance.
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Installing android Studio it. Than that nice. Affinity measurements as long as you engage in the development of on-line NDK
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Should not be installed.
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What is the drop-down list?
Window -> preferences -> Java -> Editor -> Content assist -> Auto-Activation
Content
set automatically prompts the inside '.' After
If it is a word, then you alt + /
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You can also Auto-Activation Lane. Changed abcdefghijklmnopqrstuvwxyz. Could prompt an automatic
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references, 4th Floor OnlyOneCoder reply:.

can also Auto-Activation in the automated prompts can be changed abcdefghijklmnopqrstuvwxyz a

Yes, that's so, well, thank you.