使用预建的Apache Thrift .exe时出错

Question

我从apache thrift网站下载了预构建的.exe文件，然后尝试生成一些简单的java服务器，但出现此错误

namespace java tutorial

/*
 C like comments are supported
*/
// This is also a valid comment

typedef i32 int // We can use typedef to get pretty names for the types we are using
service MultiplicationService
{
        int multiply(1:int n1, 2:int n2),
}

错误截图： https://drive.google.com/open?id=1vgzPSrlkxS6aPDAn7sBVIK5O6WLM16_X）