SCNU_Java作业：主题5：面向对象的基础：面向对象的特性_作业2：类的设计及应用

学校作业
参考师兄的

题目：
类的设计应用：
算机组装店有很多品牌的计算机配件，包括处理器（CPU）、主板(mainBoard)、内存(Ram)、……等。 每种配件都多个厂家（company）、型号（type）、价格（price）三个基本信息。
按下图所示的类的关系和要求编写适当的类，实现相关的功能。

1、假设每种配件有两个厂家，每个厂家产品有两个型号，每个型号价格不同

2、程序运行时逐个显示不同配件的型号，提供 配件型号选择菜单（如输入1，代表选择型号1，输入2，代码选择型号2）

3、根据选择的配件型号，创造出一个Computer实例，

4、 创建实例完成时，输出总价格

5、调用Conputer实例的showDetail()方法，输出输出配件的详细信息。

根据类图完成类的设置，并在Test类的main方法中测试你的程序

父类：“产品”

package theme5_2;


public class Product {
	private String name;//产品名称
	private String company;
	private String type;
	private double price;
	
	public Product(String company, String name, String type, double price) {
		super();
		this.name = name;
		this.company = company;
		this.type = type;
		this.price = price;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getCompany() {
		return company;
	}

	public void setCompany(String company) {
		this.company = company;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public double getPrice() {
		return price;
	}

	public void setPrice(double price) {
		this.price = price;
	}
	
	public String toString() {
		return "：[制造商=" + company + ", 产品名称=" + name + ", 型号=" + type + ", 价格=" + price + "]";
	}

}

CPU信息

package theme5_2;

public class CPU extends Product {
	private String buffer;//CPU的缓存
	
	public CPU( String company,String name,  String type, double price, String buffer) {
		super(company, name, type, price);
		this.buffer = buffer;
	}

	public String getBuffer() {
		return buffer;
	}

	public void setBuffer(String buffer) {
		this.buffer = buffer;
	}
	
	public String toString() {
		String superStr = super.toString();//先将前面那一长条穿下来给它，为了后面更好的加上“缓存”这个数据
		return "CPU" + superStr.substring(0,superStr.length()-1)+"，缓存="+buffer+"]";//填写CPU信息
	}
	
}

屏幕信息

package theme5_2;

public class Screen extends Product {
	private String size;//屏幕尺寸

	public Screen( String company, String name, String type, double price, String size) {
		super( company, name, type, price);
		this.size = size;
	}

	public String getSize() {
		return size;
	}

	public void setSize(String size) {
		this.size = size;
	}
	
	public String toString() {
		String superStr = super.toString();//先将前面那一长条穿下来给它，为了后面更好的加上“缓存”这个数据
		return "显示器" + superStr.substring(0,superStr.length()-1)+"，尺寸="+size+"]";//填写CPU信息
	}
}

组装电脑

package theme5_2;

public class Computer extends Product {
	private CPU cpu;
	private Screen screen;

	public Computer( String company, String name, String type, double price, CPU cpu, Screen screen) {
		super( company, name, type, price);
		this.cpu = cpu;
		this.screen = screen;
	}

	public CPU getCpu() {
		return cpu;
	}

	public void setCpu(CPU cpu) {
		this.cpu = cpu;
	}

	public Screen getScreen() {
		return screen;
	}

	public void setScreen(Screen screen) {
		this.screen = screen;
	}

	public String toString() {
		return "电脑"+super.toString();
	}
	
	public void showDetail() {
		System.out.println("配件：");
		if(cpu!=null)
			System.out.println(cpu);
		if(screen!=null)
			System.out.println(screen);
	}
}

购买电脑

package theme5_2;

import java.util.Scanner;

public class Shop {
	//商店配件
	private CPU[] cpus = new CPU[2];
	private Screen[] screens = new Screen[2];
	
	//构造方法，商店有的东西
	public Shop() {
		super();
		
		cpus[0] = new CPU("Intel", "CPU", "I7-7600", 1500, "2M");
		cpus[1] = new CPU("Intel", "CPU", "I5-7600", 1000, "1M");
		
		screens[0] = new Screen("KTC", "显示器", "KTC2400", 1500, "24英寸");
		screens[1] = new Screen("联想", "显示器", "21寸高清", 1700, "21英寸");
	}
	
	public void Sevice() {
		System.out.println("欢迎光临，HL先生！");
		System.out.println("请您选择您喜欢的配件，组装您的军工级神机！");
		double cost = 0;//总花费
		Scanner sc = new Scanner(System.in);
		
		showScreens();
		int a = sc.nextInt();
		Screen screen = null;
		cost+=screens[a-1].getPrice();
		screen = screens[a-1];
		
		showCpus();
		int b = sc.nextInt();
		CPU cpu = null;
		cost+=cpus[b-1].getPrice();
		cpu = cpus[b-1];

		Computer com = new Computer("HL先生", "军工级神机", "华师NB_Plus++", cost, cpu, screen);
		System.out.println(com);
		com.showDetail();
		
	}
	private void showScreens() {
		for(int i=0; i<screens.length; i++)
			System.out.println((i+1)+"："+screens[i]);
		System.out.println("请选择您中意的显示器：");
	}
	
	private void showCpus() {
		for(int i=0; i<cpus.length; i++)
			System.out.println((i+1)+"："+cpus[i]);
		System.out.println("请选择您niubility的CPU：");
	}
}

测试

package theme5_2;

public class Test {
	public static void main(String[] args) {
		Shop shop = new Shop();
		shop.Sevice();
		 	
	}

}

最后成品

PS：我的跟师兄比起来，模仿师兄的，简化了一些，只是为了完成作业。
当然，在模仿前任的过程中，慢慢自己也理解了很多，感谢师兄@passerbyYSQ贡献的答案，让后生我从中收获颇丰！