实例化中绑定的Java泛型参数

现在有一个大脑大放屁

我有这个：

public static final Map<WorkType, Class> handler;

公共静态最终映射处理程序；

然后

handler=newtreemap（）{{
put（WorkType.SUBMIT，UtilityHandler.class）；
}};

然后

JobHandler-JobHandler=instanceHandler（handler.get（work）、work、buildingId）；
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// !!!!!!!!!!!!!!!!! 这将显示一个未选中的分配警告
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//未经检查的赋值：“java.lang.Class”到“java.lang.Class我认为您应该声明

Map<WorkType, Class<? extends JobHandler>> handler

Map我想你想要：

Map<WorkType, Class<? extends JobHandler>> handler

MapWell，那太尴尬了。谢谢我把它放在下面，不知道为什么我认为它在上面不起作用。
@SuppressWarnings(value="unchecked")
private static JobHandler instantiateHandler(Class<? extends JobHandler> ref, WorkType type, String id) {

    if(ref == null) {
        throw new UnsupportedOperationException("This action is not supposed!");
    }

    try {
        Constructor<JobHandler> constructor = (Constructor<JobHandler>) ref.getConstructor(WorkType.class, String.class);
        JobHandler handler = constructor.newInstance(type, id);
        return handler;
    } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException | InstantiationException e) {
        Utilities.writeLogException(null, e);
    }

    return null;

}

public static final Map<WorkType, Class extends JobHandler> handler;

Map<WorkType, Class<? extends JobHandler>> handler

Map<WorkType, Class<? extends JobHandler>> handler