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25 lines
1005 B
25 lines
1005 B
// 测试类:主程序入口,测试多态调用
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public class AnimalTest {
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public static void main(String[] args) {
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// 多态:父类引用指向子类对象
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Animal dog = new Dog();
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Animal cat = new Cat();
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// 1. 测试动物叫声的多态调用
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System.out.println("=== 动物叫声测试 ===");
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dog.makeSound(); // 执行Dog类的makeSound()
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cat.makeSound(); // 执行Cat类的makeSound()
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// 2. 测试游泳能力(只有Dog实现了Swimmable)
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System.out.println("\n=== 游泳能力测试 ===");
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// 判断dog是否实现了Swimmable接口,避免转型异常
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if (dog instanceof Swimmable) {
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Swimmable swimmableDog = (Swimmable) dog;
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swimmableDog.swim(); // 执行Dog类的swim()
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}
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// Cat没有实现接口,无法调用swim()
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if (!(cat instanceof Swimmable)) {
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System.out.println("猫不会游泳");
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}
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}
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}
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