Error0---local variable S is accessed from within inner class; needs to be declared final
local variable S is accessed from within inner class; needs to be declared final
在内部类当中不能引用本地变量s,需要被声明为常量
local variable S is accessed from within inner class; needs to be declared final
在内部类当中不能引用本地变量s,需要被声明为常量