求大佬 救救迷茫的我

public class Solution { public static void main(String[] args) { printObjectType(new Cat()); printObjectType(new Bird()); printObjectType(new Lamp()); printObjectType(new Cat()); printObjectType(new Dog()); } public static void printObjectType(Object o) { //在此编写你的代码 if (o instanceof Cat) System.out.println("Cat"); if (o instanceof Dog) System.out.println("Dog"); if (o instanceof Bird) System.out.println("Bird"); if (o instanceof Lamp) System.out.println("Lamp"); } public static class Cat { } public static class Dog { } public static class Bird { } public static class Lamp { } }

• 程序必须在屏幕上显示文本。 • 不要更改 Cat 类。 • 不要更改 Dog 类。 • 不要更改 Bird 类。 • 不要更改 Lamp 类。 • printObjectType() 方法必须显示以下消息之一，具体取决于传递给它的对象。例如，对于 Solution.Lamp 对象，它应该显示“灯”。

大佬 它这里的 if条件 是通过了 什么来给 这几个类 传递了参数

The printObjectType method can accept any Object type object. The Cat, Bird, Dog classes are all descendants of the Object class, so we can pass any object to the printObjectType method. Let's take an example: a new Cat object is passed to the method. Within the method, this Cat object is stored in a variable of type Object, in the variable "o". The "instanceof" operator is able to examine this object "o" and is able to decide if it is an instance of the Cat class or not.