解决：The user operation is waiting for "Building workplace" to complete

　　今天在写单元测试的时候遇到了一个问题，点击 Run as –> Junit Test 后，eclipse 弹出一个框，一直在跑着什么东西，上面写着：The user operation is waiting for “Building workplace” to complete，等了好长时间也没见进度条前进了多少。

　　解决办法：点击菜单栏上的 Project 选项，把 Build Automactically 前面的勾去掉就好了。