4.
package page2_169;
public interface Animal {
void shout();
}
class Dog implements Animal {
public void shout() {
System.out.println("W W");
}
}
class Cat implements Animal {
public void shout() {
System.out.println("M M");
}
}
class Pig implements Animal {
public void shout() {
System.out.println("! !");
}
}
class Store {
public static Animal get(String choice) {
if (choice.equalsIgnoreCase("dog")) {
return new Dog();
} else if (choice.equalsIgnoreCase("pig")) {
return new Pig();
} else {
return new Cat();
}
}
}
package page2_169;
public class AnimalTest {
public static void main(String[] args) {
Animal a1=Store.get("pig");
a1.shout();
}
}
5.
package page2_169;
public interface Eatable {
public void eat();
}
package page2_169;
public interface FlyingDiscCatchable {
public void catchingFlyDisc();
}
package page2_169;
public interface Swimmable {
public void swim();
}
package page2_169;
public abstract class Pet {
private String name;
private int health;
private int love;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getHealth() {
return health;
}
public void setHealth(int health) {
this.health = health;
}
public int getLove() {
return love;
}
public void setLove(int love) {
this.love = love;
}
public abstract void print();
}
package page2_169;
public class Dog1 extends Pet implements FlyingDiscCatchable, Eatable {
public void eat() {
System.out.println("狗吃饭");
}
public void catchingFlyDisc() {
System.out.println("狗接飞盘");
}
public void print() {
System.out.println("宠物的自白:\n我的名字叫"+this.getName()+",健康值是"+this.getHealth()+",和主人的亲密度是"+this.getLove());
}
}
package page2_169;
public class Penguin extends Pet implements Eatable, Swimmable {
public void swim() {
System.out.println("企鹅在游泳");
}
public void eat() {
System.out.println("企鹅在吃鱼");
}
public void print() {
System.out.println("宠物的自白:\n我的名字叫"+this.getName()+",健康值是"+this.getHealth()+",和主人的亲密度是"+this.getLove());
}
}
package page2_169;
public class Test {
public static void main(String[] args) {
Dog1 dog=new Dog1();
dog.eat();
Penguin penguin=new Penguin();
penguin.swim();
dog.catchingFlyDisc();
penguin.setName("小白");
penguin.setHealth(100);
penguin.setLove(50);
penguin.print();
}
}