您可能会猜到,GenericData的构造函数有一个该泛型类型的参数,而getData()方法只返回该泛型类型。(有关完整的源代码,请参阅下面)。0 : g.getData();int cannot be converted to Double为什么Java8不能推断出像Java7这样的类型,并在自动装箱double到double之前将
String[] boxOptions = {"1","2","4","8","16","20","40","100","400"};我之前在我的程序中有这些精确的代码行,并且没有得到这个错误。我做了一点搜索,我发现的结果有点让我费解。有什么想法吗?JComboBox is a raw type. References to generic type J