eclipse设置显示行号

 设置显示行号:
Eclipse：
　　3.0　Window => Preferences => Workbench => Editors => Text Editor => 右边Show line numbers 打上勾确定即可；
　　　　 Window => Preferences => Java => Editor => 右边Show line numbers 打上勾确定即可；

　　3.1　Window => Preferences => General => Editors => Text Editors => 右边Show line numbers 打上勾确定即可。

JBuilder：Tools => Preferences => Editor => 右边的Gutter => 把下面的Show line numbers 打上勾确定即可；