目录

采用继承的思想实现猫和狗的案例采用多态的思想实现猫和狗的案例采用抽象类的思想实现猫和狗的案例采用接口的思想实现猫和狗的案例

采用继承的思想实现猫和狗的案例

分析： ①猫： 成员变量：姓名，年龄 构造方法：无参，带参 成员方法：get/set方法，抓老鼠() ②狗： 成员变量：姓名，年龄 构造方法：无参，带参 成员方法：get/set方法，看门() ③共性： 成员变量：姓名，年龄；构造方法：无参，带参；成员方法：get/set方法 步骤： 1、定义动物类(Animal) 【成员变量：姓名，年龄】【 构造方法：无参，带参】【成员方法：get/set方法】 2、定义猫类(Cat)，继承动物类 【构造方法：无参，带参】【成员方法：抓老鼠() 】 3、定义狗类(Dog)，继承动物类【构造方法：无参，带参】【成员方法：看门() 】 4、定义测试类(AnimalDemo)，写代码测试

动物类

public class Animal{ private String name; private int age; public Animal() { } public Animal(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }

猫类

class Cat extends Animal{ public Cat() { } public Cat(String name, int age) { super(name, age); } public void catchMouse(){ System.out.println("猫抓老鼠"); } } class Dog extends Animal{ public Dog() { } public Dog(String name, int age) { super(name, age); } public void lookdoor(){ System.out.println("狗看门"); } }

测试类

public class AnimalDemo{ public static void main(String[] args) { //创建猫类对象并进行测试 Cat c1 = new Cat(); c1.setName("加菲猫"); c1.setAge(5); System.out.println(c1.getName() + "," + c1.getAge()); c1.catchMouse(); Dog c2 = new Dog("二哈狗", 6); System.out.println(c2.getName() + "," + c2.getAge()); c2.lookdoor(); } }

采用多态的思想实现猫和狗的案例

动物类

public class Animal { private String name; private int age; public Animal() { } public Animal(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public void eat(){ System.out.println("动物吃东西"); } }

猫类

public class Cat extends Animal { public Cat() { } public Cat(String name, int age) { super(name, age); } @Override public void eat() { System.out.println("猫吃鱼"); } }

狗类

public class Dog extends Animal { public Dog() { } public Dog(String name, int age) { super(name, age); } @Override public void eat() { System.out.println("狗吃骨头"); } }

测试类

public class Demo { public static void main(String[] args) { Animal cat=new Cat(); cat.setName("加菲猫"); cat.setAge(5); System.out.println(cat.getName() + "," + cat.getAge()); cat.eat(); Animal dog=new Dog(); dog.setName("二哈狗"); dog.setAge(4); System.out.println(dog.getName() + "," + dog.getAge()); dog.eat(); } }

采用抽象类的思想实现猫和狗的案例

动物类

public abstract class Animal01 { private String name; private int age; public Animal01() { } public Animal01(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public abstract void eat(); }

猫类

public class Cat01 extends Animal01{ public Cat01() { } public Cat01(String name, int age) { super(name, age); } @Override public void eat() { System.out.println("猫吃鱼"); } }

狗类

public class Dog01 extends Animal01 { public Dog01() { } public Dog01(String name, int age) { super(name, age); } @Override public void eat() { System.out.println("狗吃骨头"); } }

测试类

public class Demo01 { public static void main(String[] args) { Animal01 cat=new Cat01(); cat.setName("加菲猫"); cat.setAge(6); System.out.println(cat.getName() + "," + cat.getAge()); cat.eat(); Animal01 dog=new Dog01(); dog.setName("二哈狗"); dog.setAge(6); System.out.println(dog.getName() + "," + dog.getAge()); dog.eat(); } }

采用接口的思想实现猫和狗的案例

案例需求 对猫和狗进行训练，他们就可以跳高了，这里加入跳高功能。 请采用抽象类和接口来实现猫狗案例，并在测试类中进行测试。

动物类

public abstract class Animal02 { private String name; private int age; public Animal02() { } public Animal02(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public abstract void eat(); }

跳高接口

public interface Jumpping { public abstract void jump(); }

猫类

public class Cat02 extends Animal02 implements Jumpping { public Cat02() { } public Cat02(String name, int age) { super(name, age); } @Override public void eat() { System.out.println("猫吃鱼"); } @Override public void jump() { System.out.println("猫可以跳高"); } }

测试类

public class Demo02 { public static void main(String[] args) { //创建对象，调用方法 Jumpping j = new Cat02(); j.jump(); System.out.println("­­­­­­­­"); Animal02 a = new Cat02(); a.setName("加菲猫"); a.setAge(5); System.out.println(a.getName()+","+a.getAge()); a.eat(); ((Cat02) a).jump(); System.out.println("­­­­­­­­"); Cat02 c = new Cat02(); c.setName("加菲猫"); c.setAge(5); System.out.println(c.getName()+","+c.getAge()); c.eat(); c.jump(); } }