老师，为什么我这个总是显示can't find symbol,还有中文他为什么输出不了

什么工具？ 什么平台？ 疑似编码问题

A "Cannot find symbol" error is about the identifiers.  When your code is compiled, the compiler needs to work out what each and every identifier in your code means.

A "Cannot find symbol" error means that the compiler cannot do this. Your code appears to be referring to something that the compiler doesn't understand.

https://stackoverflow.com/questions/25706216/what-does-a-cannot-find-symbol-compilation-error-mean