在运行时实现接口:未实现get_Value方法

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

interface MyInterface {
    void get_Value();
}

class MyImplementation implements MyInterface {
    public void get_Value() {
        System.out.println("Implementation of get_Value method");
    }
}

class MyProxy implements InvocationHandler {
    private Object target;

    public MyProxy(Object target) {
        this.target = target;
    }

    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        if (method.getName().equals("get_Value")) {
            System.out.println("Dynamic implementation of get_Value method");
            return null;
        }
        return method.invoke(target, args);
    }
}

public class Main {
    public static void main(String[] args) {
        MyInterface implementation = new MyImplementation();
        MyInterface proxy = (MyInterface) Proxy.newProxyInstance(
                implementation.getClass().getClassLoader(),
                implementation.getClass().getInterfaces(),
                new MyProxy(implementation)
        );

        proxy.get_Value(); // 输出：Dynamic implementation of get_Value method
    }
}

class MyMeta(type):
    def __call__(cls, *args, **kwargs):
        if 'get_Value' in cls.__dict__:
            print('Dynamic implementation of get_Value method')
        return super().__call__(*args, **kwargs)

class MyInterface(metaclass=MyMeta):
    pass

class MyImplementation(MyInterface):
    def get_Value(self):
        print('Implementation of get_Value method')

class MyDynamicImplementation(MyInterface):
    pass

implementation = MyImplementation()
implementation.get_Value()  # 输出：Implementation of get_Value method

dynamic_implementation = MyDynamicImplementation()
dynamic_implementation.get_Value()  # 输出：Dynamic implementation of get_Value method