oop 商品信息按商品名称查询 商品按价格排序 内含测试类

class Product

public class Product{

private int pid;//商品编号

private String pname;//商品名称

private double price;//商品价格

private int pnum;//商品数量

public Product(){

}

public Product(int pid,String pname,double price,int pnum){

this.pid=pid;

this.pname=pname;

this.price=price;

this.pnum=pnum;

}

public double getPrice(){

return this.price;

}

public String getPname(){

return this.pname;

}

public void showInfo(){

System.out.println("商品编号"+this.pid+"商品名称"+this.pname+"商品价格"+this.price+"商品数量"+this.pnum);

} 

}

      class      Test

import java.util.Random;import java.util.Scanner;public class Test {public static void main(String [] args){//存储商品信息 声明一个存储商品信息的数据Product [] products=new Product[5];Random rd=new Random();//从键盘上输入Scanner sc=new Scanner (System.in);for(int i=0;i<products.length;i++){System.out.println("请输入商品编号");int pid=sc.nextInt();sc.nextLine();System.out.println("请输入商品名称");String pname=sc.nextLine();System.out.println("请输入商品单价");double price=sc.nextDouble();System.out.println("请输入商品数量");int pnum=sc.nextInt();//使用数组下标访问每个商品信息products[i]=new Product(pid,pname,price,pnum);}//打印商品信息print(products);sc.nextLine();System.out.println("请输入你要查找的商品信息");String name=sc.nextLine();//调用查找的方法int index=findByName(products,name);if(index<0){System.out.println("查无此商品");}else{products[index].showInfo();//打印商品信息}System.out.println("请对商品进行排序（desc/asc）：");String input=sc.nextLine();order(products,input);System.out.println("排序之后的结果：");print(products);}//显示所有商品信息public static void print(Product [] products){if(null==products){System.out.println("数组不能为空");return ;}for(Product p:products){p.showInfo();//显示信息}}//根据商品名称查找商品信息public static int findByName(Product []products,String name){if(null==products){System.out.println("数组为空");return -1;}//去除字符串的空格for(int i=0;i<products.length;i++){if(name.trim().equals(products[i].getPname().trim())){return i;}}return -1;}//排序public static void order(Product [] products,String str){if(null==products){System.out.println("数组为空");return ;}//降序if("desc".equals(str)){for(int i=0;i<products.length-1;i++){for(int j=0;j<products.length-i-1;j++){Product temp=new Product();if(products[j].getPrice()<products[j+1].getPrice()){temp=products[j];products[j]=products[j+1];products[j+1]=temp;}}}}//升序if("asc".equals(str)){for(int i=0;i<products.length-1;i++){for(int j=0;j<products.length-i-1;j++){Product temp=new Product();if(products[j].getPrice()>products[j+1].getPrice()){temp=products[j];products[j]=products[j+1];products[j+1]=temp;}}}}}}