未使用实例化的子级调用父方法

// Java示例代码
class Parent {
    public void printMessage() {
        System.out.println("This is the parent class.");
    }
}

class Child extends Parent {
    public void printMessage() {
        super.printMessage(); // 调用父类的printMessage方法
        System.out.println("This is the child class.");
    }
}

public class Main {
    public static void main(String[] args) {
        Child child = new Child();
        child.printMessage(); // 输出：This is the parent class. This is the child class.
    }
}

# Python示例代码
class Parent:
    def print_message(self):
        print("This is the parent class.")

class Child(Parent):
    def print_message(self):
        super().print_message() # 调用父类的print_message方法
        print("This is the child class.")

child = Child()
child.print_message() # 输出：This is the parent class. This is the child class.