Alt+/ 提示不管用?

问题:
Alt+/ 提示不管用?

解决办法:

1、菜单window->Preferences->Java->Editor->Content

Assist->Enable auto activation

选项要打上勾

2、“window”→“Preferences”→General→Keys→找到Content Assist

在Binding中输入你要设置的快捷键，OK

3、window->Preferences->Java->Editor->Content

Assist->Advanced

上面的选项卡Select the proposal kinds contained in the 'default' contentassist list: 中把 Other Java Proposals 选项打上勾就可以了。