1.设计Bird,Fish类，都继承抽象类Animal，实现其抽象方法info（ ），并输出他们的信息。
/**
* 哺乳类
* @author lenovo
*
*/
public abstract class Animal {
private int age; // 年龄
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
/**
* 无参构造方法
*/
public Animal() {
super();
}
public Animal(int age) {
this.age = age;
}
/**
* 抽象方法
*/
public abstract void info();
}
/**
* 鸟类
* @author lenovo
*
*/
public class Bird extends Animal{
private String color; //颜色
/**
* 有参构造方法
* @param age 年龄
* @param color 颜色
*/
public Bird(int age,String color) {
super(age);
this.color = color;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
/**
* 调用抽象方法
*/
@Override
public void info() {
// TODO Auto-generated method stub
System.out.println("我是一只"+getColor()+"的鸟！");
System.out.println("今年"+getAge()+"岁了！");
}
}
/**
*
* @author 鱼类
*
*/
public class Fish extends Animal {
private int weight;
/**
* 有参构造方法
* @param age
* @param weight
*/
public Fish(int age,int weight) {
super(age);
this.weight = weight;
}
public int getWeight() {
return weight;
}
public void setWeight(int weight) {
this.weight = weight;
}
/**
* 调用抽象方法打印
*/
@Override
public void info() {
// TODO Auto-generated method stub
System.out.println("我是一只"+getWeight()+"斤重的鱼！");
System.out.println("今年"+getAge()+"岁了！");
}
}
/**
*
* @author测试类
*
*/
public class Test {
public static void main(String[] args) {
Animal b = new Bird(4,"红色") ; //创建新的对象并赋值
b.info();
System.out.println("");
Animal c = new Fish(5,2);
c.info();
}
}
2.兜兜家养了俩只家禽:一只鸡和一只鸭。请用面对思想的封装，继承的特性进行描述。
/**
*
* @author 家禽类
*
*/
public abstract class Fowl {
private String name; //昵称
private String likefavorite; //喜欢的食物
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLikefavorite() {
return likefavorite;
}
public void setLikefavorite(String likefavorite) {
this.likefavorite = likefavorite;
}
/**
* 无参构造方法
*/
public Fowl() {
super();
// TODO Auto-generated constructor stub
}
/**
* 有参构造方法
* @param name
* @param likefavorite
*/
public Fowl(String name, String likefavorite) {
super();
this.name = name;
this.likefavorite = likefavorite;
}
/**
* 抽象方法
*/
public abstract void print();
}
/**
*
* @author 鸡类
*
*/
public class Chicken extends Fowl {
private String strain; //品种
private String hobby; //爱好
/**
* 有参构造方法
* @param name 昵称
* @param likefavorite 爱吃的食物
* @param strain 品种
* @param hobby 爱好
*/
public Chicken(String name, String likefavorite ,String strain,String hobby) {
super(name, likefavorite);
this.strain = strain;
this.hobby = hobby;
}
public String getStrain() {
return strain;
}
public void setStrain(String strain) {
this.strain = strain;
}
public String getHobby() {
return hobby;
}
public void setHobby(String hobby) {
this.hobby = hobby;
}
/**
* 调用抽象方法打印输出
*/
public void print() {
System.out.println("我叫："+getName()+",是一只"+getStrain()+"!");
System.out.println("我喜欢吃"+getLikefavorite()+"!");
System.out.println("我会"+getHobby()+"!");
}
}
/**
*
* @author 鸭类
*
*/
public class Duck extends Fowl {
private String kind; //种类
private String hobby; //爱好
/**
* 有参构造方法
* @param name 昵称
* @param likefavorite 爱吃的
* @param kind 种类
* @param hobby 爱好
*/
public Duck(String name, String likefavorite,String kind,String hobby) {
super(name, likefavorite);
this.kind = kind;
this.hobby = hobby;
}
public String getKind() {
return kind;
}
public void setKind(String kind) {
this.kind = kind;
}
public String getHobby() {
return hobby;
}
public void setHobby1(String hobby) {
this.hobby = hobby;
}
/**
*调用抽象方法打印并输出
*/
public void print() {
System.out.println("我叫"+getName()+",是一只"+getKind()+"!");
System.out.println("我喜欢吃"+getLikefavorite()+"!");
System.out.println("我会"+getHobby()+"!");
}
/**
*
* @author 测试类
*
*/
public class Test1 {
public static void main(String[] args) {
Chicken chi = new Chicken("喔喔","虫子","芦花鸡","打鸣");
chi.print();
System.out.println("");
Duck duck = new Duck("嘎嘎","小鱼虾","斑嘴鸭","游泳");
duck.print();
}
}
3.练习题：
/**
*
*汽车类
*
*/
public abstract class MotoVehcle {
private String no; //车牌号
private int brand; //品牌
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public int getBrand() {
return brand;
}
public void setBrand(int brand) {
this.brand = brand;
}
/**
* 无参构造方法
*/
public MotoVehcle() {
}
public MotoVehcle(String no, int brand) {
super();
this.no = no;
this.brand = brand;
}
/**
* 抽象方法
* @param days
*/
public abstract int caiRent(int days);
}
/**
*
* @author 小汽车类
*
*/
public final class Car extends MotoVehcle {
private int type; //型号
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
public Car(String no,int brand,int type) {
super(no, brand);
this.type = type;
// TODO Auto-generated constructor stub
}
public int caiRent(int days) {
if (type == 1) { //宝马
return 500 * days;
} else {
if (type == 2) { //别克
return 600 * days;
} else {
return 300 * days;
}
}
}
}
/*
* 大巴车类
*/
public final class Bus extends MotoVehcle {
private int seatCount; //座位数
public int getSeatCount() {
return seatCount;
}
public void setSeatCount(int seatCount) {
this.seatCount = seatCount;
}
public Bus(int seatCount) {
super();
this.seatCount = seatCount;
}
public int caiRent(int days) {
if(seatCount<=16) { //金杯
return 800*days;
}else { //金龙
return 1500*days;
}
}
}
/**
*
* @author测试类
*
*/
public class Test {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("欢迎您你来到汽车租赁公司！");
System.out.print("请输入要租赁的天数：");
int days = input.nextInt();
System.out.print("请输入租赁的汽车类型（1.轿车 2.客车）：");
int tepy = input.nextInt();
if (tepy == 1) {
System.out.print("请输入要租赁的汽车品牌（1.宝马 2别克）：");
int brand = input.nextInt();
if (tepy == 1) {
System.out.println("1.宝马 550i");
} else if (tepy == 2) {
System.out.print("请输入要租赁的汽车品牌（2.商务舱GL8 3.林荫大道）：");
tepy = input.nextInt();
}
String no = "京BK5543";
System.out.println("分配给你的车牌是：" + no);
Car car = new Car(no, days, brand);
System.out.println("\n\n您好，您需要支付的租赁费是：" + car.caiRent(days));
} else {
if (tepy == 1) {
System.out.print("请输入要租赁的汽车品牌（1.金杯 2金龙）：");
int brand = input.nextInt();
}
System.out.print("请输入客车座位数：");
int seatCount = input.nextInt();
System.out.println("分配给你的号牌是：京AU8769");
Bus bus = new Bus(seatCount);
System.out.println("\n\n您好，您需要支付的租赁费是：" + bus.caiRent(days));
}
}
}