List<String> myList = new ArrayList<String>();
processList(myList);
processListGeneric(myList);

public static void processList(List myList) {
Iterator it = myList.iterator();
while(it.hasNext())
    System.out.println(it.next());
}

public static void processListGeneric(List<?> myList) {
    Iterator<?> it = myList.iterator();
    while(it.hasNext())
        System.out.println(it.next());
}

这两个方法的名称不能相同,因为它会导致编译时错误.那么这两种方法有什么不同吗？