1、菜单window-> Preferences-> Java-> Editor-> Content?? Assist-> Enable?? auto?? activation?? 选项要打上勾
2、windows--> preference--> workbench--> keys?? 下设置Content???????? Assist???????? 的快捷键
3、 window-> Preferences-> Java-> Editor-> Content?? Assist-> Advanced?????? 上面的选项卡Select?? the?? proposal?? kinds?? contained?? in?? the?? 'default '?? content?? assist?? list:?? 中把?? Other?? Java?? Proposals?? 选项打上勾就可以了。
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