【《Java程序设计》软件18-1,3 作业（OO1）】

这个把题目给的代码也包含进去了，注意看，这个题使用的接口看一看，想想它给题目带来了什么好处。多看看题目给的代码，将整道题都搞懂。

import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String mainBoardModel = scan.next();//用户输入主板的型号
		String mousePS2Model = scan.next();//用户输入PS2口鼠标的型号
		String keyBoardPS2Model = scan.next();//用户输入PS2口键盘的型号
		String flashDiskModel = scan.next();//用户输入U盘的型号
		
		MainBoard mainboard = new MainBoard(mainBoardModel);//生成主板对象
		
		KeyBoardPS2 keyboard = new KeyBoardPS2(keyBoardPS2Model);//生成PS2口键盘对象
		mainboard.setPs2(keyboard);//将键盘接入主板的PS2口
		mainboard.inputFromPS2();//获取从键盘录入的数据（注意：是模拟从键盘录入数据，不需要编码利用Scanner接收数据）
		
		mainboard.setPs2(null);//拔出PS2口键盘
		
		MousePS2 mouse = new MousePS2(mousePS2Model);//生成PS2口的鼠标对象
		mainboard.setPs2(mouse);//将鼠标接入主板的PS2口
		mainboard.inputFromPS2();//获取从键盘录入的数据
		////////////////////////////////////////////////////////
		FlashDisk flashdisk = new FlashDisk(flashDiskModel);//生成U盘对象
		mainboard.setUsb(flashdisk);//在主板上插入U盘的USB口
		mainboard.read();//从外接设备（USB或TypeC口设备上读取数据，只要接入相关设备，则从该设备读取数据）
		mainboard.setUsb(null);//拔下U盘：flashdisk
		
		mainboard.setTypeC(flashdisk);//将U盘：flashdisk插入主板的TypeC口（FlashDisk的对象同时支持USB和TypeC口）
		mainboard.read();//从外接设备（USB或TypeC口设备上读取数据，只要接入相关设备，则从该设备读取数据）
		
		MouseUSB mouseUSB = new MouseUSB();//生成USB鼠标
		mainboard.setUsb(mouseUSB);//在主板上插入USB鼠标的USB口
		
	    scan.close();
	}
}

/* 
答案
*/

interface USB{
	void readFromUSB();
}
interface TypeC{
	void readFromTypeC();
}
interface PS2{
	void inputFromPS2();
}
class KeyBoardPS2 implements PS2{
	private String model;
	
	public void setModel(String model) {
		this.model = model;
	}

	public KeyBoardPS2(String model) {
		this.model = model;
	}
	
	public KeyBoardPS2() {
		this.model = "";
	}

	public void inputFromPS2() {
		System.out.println("Get data from "+this.model+" PS2 keyboard");
	}
}
class MousePS2 implements PS2{
	private String model;
	
	public void setModel(String model) {
		this.model = model;
	}
	
	public MousePS2(String model) {
		this.model = model;
	}
	public MousePS2() {
		this.model = "";
	}
	public void inputFromPS2(){
		System.out.println("Get data from " + this.model + " PS2 Mouse");
	}
	
}
class FlashDisk implements USB, TypeC{
	private String model;
	
	public void setModel(String model) {
		this.model = model;
	}
	public FlashDisk() {
		this.model = "";
	}
	public FlashDisk(String model) {
	
		this.model = model;
	}

	@Override
	public void readFromTypeC() {
		// TODO Auto-generated method stub
		System.out.println("Read data through " + this.model + " TypeC U盘");
	}

	@Override
	public void readFromUSB() {
		// TODO Auto-generated method stub
		System.out.println("Read data through " + this.model + " USB U盘");
	}
	
	
}
class MouseUSB implements USB{
	private String model;
	
	public String getModel() {
		return model;
	}

	public void setModel(String model) {
		this.model = model;
	}

	public MouseUSB(String model) {
		
		this.model = model;
	}
	
	public MouseUSB() {
		// TODO Auto-generated constructor stub
		this.model = "";
	}

	@Override
	public void readFromUSB() {
		// TODO Auto-generated method stub
		System.out.println("Read data through " + this.model + " USB Mouse");
	}

	
}
class MainBoard{
	private String model;
	private USB usb;
	private TypeC typec;
	private PS2 ps2;
	public MainBoard(String mainBoardModel) {
		// TODO Auto-generated constructor stub
		this.model = mainBoardModel;
	}
	
	public void setTypeC(TypeC typec) {
		// TODO Auto-generated method stub
		this.typec = typec;
	}
	public void read() {
		// TODO Auto-generated method stub
		System.out.print(this.model+" MainBoard:");
		if(this.usb != null) {
			this.usb.readFromUSB();
		}else {
			this.typec.readFromTypeC();
		}
	}
	public void setUsb(USB usb) {
		// TODO Auto-generated method stub
		this.usb = usb;
	}
	public void inputFromPS2() {
		// TODO Auto-generated method stub
		System.out.print(this.model+" MainBoard:");
		this.ps2.inputFromPS2();
	}
	public void setPs2(PS2 ps2) {
		// TODO Auto-generated method stub
		this.ps2 = ps2;
	}
	
}