If you have used the automatic completion function of Visual Studio, then use Eclipse's Auto-completion function, I believe you will be a little disappointed.
But eclipse is actually very powerful, and Eclipse's auto-completion is not as good as it is because the eclipse's completion function uses the default settings. You just have to change it a little bit.
The simplest way to modify this is: Windows-->preferences-->java-->editor-->content Asist, in auto activation triggers for There is only one "." In the text box behind Java. Now you can change it to ". Abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz". Then you try again and you'll find that the completion function is almost the same as vs. You can also set up advanced settings in advance and favorite.
Original address: http://www.cnblogs.com/dongritengfei/archive/2010/09/09/1822258.html
Eclipse Auto-Complete settings