创建一个Test类

public class Test {//创建一个Test类
public static void main(String[] args) {
Animal animal1 = new Eagle();
animal1.setName("鹰");
System.out.print(animal1.getName());
((Eagle) animal1).eat();

    Animal animal2 = new Frog();
    animal2.setName("青蛙");
    System.out.print(animal2.getName());
    ((Frog) animal2).eat();
    
    Animal animal3 = new Grasshopper();
    animal3.setName("蝗虫");
    System.out.print(animal3.getName());
    ((Grasshopper) animal3).eat();
}

}