package com.whxiong.work05;
import java.util.Scanner;
import com.whxiong.work05_2.Friends;
import com.whxiong.work05_2.Master;
/**
* 第五章课后习题测试类
* @param args
*/
public class Demo {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("课后习题第五题");
System.out.println("************************************");
/**
* 实例化ChoosePrinter
*/
ChoosePrinter printer01 = new ChoosePrinter();
/**
* 选择打印机类型
*/
System.out.println("请选择您要使用的打印机：1.针式打印机 2.喷墨打印机 3.激光打印机");
int typeid = input.nextInt();
Printer printer = printer01.gettype(typeid);
if (printer != null) {
printer01.print(printer);
} else {
System.out.println("对不起，没有该类型打印机！");
}
System.out.println();
System.out.println("课后习题第六题");
System.out.println("************************************");
Master master=new Master("牛犇");
System.out.println("请选择牛犇朋友的国家：1.中国 2.美国");
int chooseCountry=input.nextInt();
Friends friends=master.Treat(chooseCountry);
if(friends!=null){
System.out.println("谢谢"+master.getName()+"的热情招待！");
}else{
System.out.println("不好意思,牛犇不认识您！");
}
********************************************************
package com.whxiong.work05;
/**
* Frinends 牛犇的朋友类
* @author whx
*/
public abstract class Friends {
private String country; //国家
private String name; //名字
private String eat; //食物
private String play; //运动
/**
* 带参构造
* @param country
* @param name
* @param eat
* @param play
*/
public Friends(String country,String name, String eat, String play) {
super();
this.country=country;
this.name = name;
this.eat = eat;
this.play = play;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEat() {
return eat;
}
public void setEat(String eat) {
this.eat = eat;
}
public String getPlay() {
return play;
}
public void setPlay(String play) {
this.play = play;
}
/**
* 定义抽象类的Eat方法
*/
public abstract void Eat();
/**
* 定义抽象类的Play方法
*/
public abstract void Play();
}
/**
* America 美国朋友 子类
* @author whx
*/
class America extends Friends {
/**
* 调用父类中的带参构造
* @param country
* @param name
* @param eat
* @param play
*/
public America(String country,String name, String eat, String play) {
super(country,name, eat, play);
}
@Override
public void Eat() {
{
System.out.println("我叫"+this.getName()+",我是"+this.getCountry()
+"人"+"\n\t我喜欢吃"+this.getEat());
}
}
@Override
public void Play() {
System.out.println("\t我喜欢的运动是"+this.getPlay());
}
}
/**
* China 中国朋友 子类
* @author whx
*/
class China extends Friends{
/**
* 调用父类中的带参构造
* @param country
* @param name
* @param eat
* @param play
*/
public China(String country,String name, String eat, String play) {
super(country,name, eat, play);
}
@Override
public void Eat() {
System.out.println("我叫"+this.getName()+",我是"
+this.getCountry()+"人"+"\n\t我喜欢吃"+this.getEat());
}
@Override
public void Play() {
System.out.println("\t我喜欢的运动是"+this.getPlay());
}
}
/**
* Master 主人牛犇 类
* @author whx
*/
class Master {
private String name;//主人姓名
/**
* 带参构造
* @param name
*/
public Master(String name){
this.name=name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
/**
* @param chooseCountry选择国家
* @return
*/
public Friends Treat(int chooseCountry){
Friends friends=null;
if(chooseCountry==1){
friends=new China("中国","王小强", "四川菜", "太极拳");
friends.Eat();
friends.Play();
}
if(chooseCountry==2){
friends=new America("美国","约翰", "比萨", "橄榄球");
friends.Eat();
friends.Play();
}
return friends;
}*************************************************
package com.whxiong.work05;
/**
* Printer 创建打印机类
* abstract 抽象不可被实例化
* @author whx
*/
public abstract class Printer {
//打印机类型
private String type;
/**
* 带参构造
* @param type
*/
public Printer(String type){
this.type=type;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
/**
* 定义抽象方法print
*/
public abstract void print();
}
/**
* DotMatrixPrinter 针式打印机 子类
* @author whx
*/
class DotMatrixPrinter extends Printer {
public DotMatrixPrinter(String type) {
super(type);
}
@Override
public void print() {
System.out.println("***您选择的打印机是" + this.getType() + "***");
}
}
/**
* InkpetPrinter 喷墨打印机 子类
*
* @author whx
*/
class InkpetPrinter extends Printer {
public InkpetPrinter(String type) {
super(type);
}
@Override
public void print() {
System.out.println("***您选择的打印机是" + this.getType() + "***");
}
}
/**
* LaserPrinter 激光打印机 子类
* @author whx
*/
class LaserPrinter extends Printer {
public LaserPrinter(String type) {
super(type);
}
@Override
public void print() {
System.out.println("***您选择的打印机是" + this.getType() + "***");
}
}
/**
* ChoosePrinter 选择打印机
* @author whx
*/
class ChoosePrinter {
/**
* 选择打印机类型
* @param id打印机编号
*/
public Printer gettype(int typeid) {
Printer printer = null;
if (typeid == 1) {
printer = new DotMatrixPrinter("针式打印机");
}
if (typeid == 2) {
printer = new DotMatrixPrinter("喷墨打印机");
}
if (typeid == 3) {
printer = new DotMatrixPrinter("激光打印机");
}
return printer;
}
/**
* 打印机开始打印
* @param printer
*/
public void print(Printer printer) {
/**
* 判断对象printer是InkpetPrinter类型
*/
if (printer instanceof InkpetPrinter) {
/**
* 由于printer是父类对象，强制转换
*/
InkpetPrinter ink = (InkpetPrinter) printer;
ink.print();
}
/**
* 判断对象printer是LaserPrinter类型
*/
if (printer instanceof LaserPrinter) {
/**
* 由于printer是父类对象，强制转换
*/
LaserPrinter laser = (LaserPrinter) printer;
laser.print();
}
/**
* 判断对象printer是DotMatrixPrinter类型
*/
if (printer instanceof DotMatrixPrinter) {
/**
* 由于printer是父类对象，强制转换
*/
DotMatrixPrinter dot = (DotMatrixPrinter) printer;
dot.print();
}
}