関連ワード:  class java lang string cannot be cast to class b    class java lang string cannot be cast to class org bson types objectid    class java lang string cannot be cast to class java lang boolean    class java lang string cannot be cast to class java math bigdecimal    class java lang string cannot be cast to class java nio bytebuffer    class java lang string cannot be cast to class java math biginteger    java lang classcastexception class java lang string cannot be cast to class b    java lang classcastexception class java lang string cannot be cast to class java lang boolean    java lang classcastexception class java lang string cannot be cast to class java math bigdecimal    class b cannot be cast to class java lang string kafka  
結果 : class java lang string cannot be cast to class b