网上好多不完整的做法,都一味的说File->Settings->Editor->Appearence->Show Line Number
可我用的是idea 14 所以正确的做法是 File->Settings->Editor->General->Appearence->Show Line Number
多了个General
intellij idea 14 显示行号
原文:http://www.cnblogs.com/ljan69/p/4999718.html