我正在开发一个 Android 应用程序，但遇到了一些问题，我不断收到错误消息:
Illegal modifier for the class FavsPopupFragment; only public, abstract & final are permitted
这发生在关注 this answer 之后另一个SO问题。这是我的代码:
package com.package.name;
/* Imports were here */
public static class FavsPopupFragment extends SherlockDialogFragment {
static FavsPopupFragment newInstance() {
FavsPopupFragment frag = new FavsPopupFragment();
return frag;
}
}
错误出现在类名上。我不明白为什么这不起作用，请帮助。谢谢。
最佳答案
您不能创建顶级静态类；这就是编译器试图告诉你的。也看看答案here至于为什么会这样。要点是:
What the static boils down to is that an instance of the class can stand on its own. Or, the other way around: a non-static inner class (= instance inner class) cannot exist without an instance of the outer class. Since a top-level class does not have an outer class, it can't be anything but static.
Because all top-level classes are static, having the static keyword in a top-level class definition is pointless.
关于java - 为什么静态类在 Java 中是非法的？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11831791/