如何使用反射(Java)调用私有静态方法? [英] How do I invoke a private static method using reflection (Java)?
问题描述
我想调用私有静态方法。我有它的名字。我听说可以使用Java反射机制完成。我该怎么办?
I would like to invoke a private static method. I have its name. I've heard it can be done using Java reflection mechanism. How can I do it?
编辑:我在尝试调用方法时遇到的一个问题是如何指定其参数的类型。我的方法接收一个参数,其类型是Map。因此我无法做 Map< User,String> .TYPE
(在运行时由于Java类型擦除而没有Map这样的东西)。有另一种获取方法的方法吗?
One problem I encountered when trying to invoke the method is how to specify the type of its argument. My method receives one argument and its type is Map. Therefore I cannot do Map<User, String>.TYPE
(In run time there's no such a thing as Map because of Java Type erasure). Is there another way to get the method?
推荐答案
假设您要调用MyClass.myMethod(int x);
Let's say you want to call MyClass.myMethod(int x);
Method m = MyClass.class.getDeclaredMethod("myMethod", Integer.TYPE);
m.setAccessible(true); //if security settings allow this
Object o = m.invoke(null, 23); //use null if the method is static
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