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20 lines
521 B
20 lines
521 B
public class Main {
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public static void main(String[] args){
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Animal dog = new Dog();
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Animal cat = new Cat();
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System.out.println("动物叫声");
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dog.makeSound();
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cat.makeSound();
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System.out.println("是否会游泳");
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if (dog instanceof Swimmable){
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((Swimmable) dog).swim();
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}
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if (cat instanceof Swimmable){
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((Swimmable) cat).swim();
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} else {
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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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