设置Eclipse自动补全变量名

具体配置步骤如下：

Windows -> Preferences -> Java -> Editor -> Content Assist

选中 Enable auto-activation 选项

Auto activation delay 设置为0

Auto activation triggers for Java 设置为.abcdefghijklmnopqrstuvwsyzABCDEFGHIJKLMNOPQRSTUVWSYZ_

Auto activation triggers for Javadoc 保持默认