小编max*_*mol的帖子

我有一个扩展LinkedHashMap的类(EntireFile).我尝试施放:

EntireFile old = (EntireFile) functionReturningLinkedHashMap();

它会抛出异常消息:"java.util.LinkedHashMap不能转换为com.gmail.maximsmol.YAML.GroupMap".

public class EntireFile extends LinkedHashMap<String, GroupMap>

public class GroupMap extends LinkedHashMap<String, CategoryMap>

public class CategoryMap extends LinkedHashMap<String, LinkedHashMap<String, Integer>>

请帮我解决错误!