这样设置Eclipse就可以实现单词自动补全：
You can setting Eclipse in this way to achieve WordAutoComplete
打开Eclipse的设置界面Preference；
再像下面这样，一步步打开设置目录和设置参数：
Eclipse.Preference.Java.Editor.Content-Assist+[Click-it].AutoAction {
Enable-auto-activation=true;
Auto-activation-delay(ms)=200;
Auto-activation-triggers-for-Java=.abcdefghijklmnopqrstuvwxyz;
Auto-activation-triggers-for-Javadoc=@#;
}
翻译自：
http://blog.csdn.net/liliangchw/article/details/8533429