Shopping malls inventory exercise

l  watch list later, it may be a list divided into three parts (top of list, the list in section, a list of the bottom portion)

 

l 1. Listing top fixed data, direct printing can

l 2. Listing in the commodity unit, the data changes, product information needs to be recorded, printing

Through observation, we should determine a product has the following attributes:

Brand Model : - title, String type

Size: size of the article, Double Type

Price: Price items, Double Type

Configuration: this one is the configuration information for each product, String type

Inventory: this one is the number of inventories of each commodity, int type

l 3. Listing bottom portion comprises a statistical operation, the need has been calculated, the printing

We found two separate amount may vary

Total stock: the total number of all goods, int type

Stock Amount: the amount of all commodities, Double Type

 

import java.util.Scanner;
import java.util.ArrayList;

public class Menu {

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        ArrayList<Goods> list=new ArrayList<Goods>();
        while(true){
            mainMenu();    
            int choose=sc.nextInt();
            switch(choose){
            case 1:
//                货物清单
                getGoods (List);
                 BREAK ;
             Case 2 : 
                deleteGoods (List); 
                BREAK ;
             Case . 3 :
 //                 add goods 
                addGoods (List);
                 BREAK ;
             Case . 4 : 
                updateGoods (List); 
                BREAK ;
             Case . 5 :
                 return ;
                 default : 
                    the System. out.println ( "you make a mistake, re-enter" );
                    BREAK ; 
            
            } 
            
        } 
        
    } 
    
    public  static  void mainMenu () { 
        System.out.println ( "Welcome to Oracle supermarket ===== ========" ); 
        System.out.println ( "1. list of goods " ); 
        System.out.println ( " 2. delete the goods " ); 
        System.out.println ( " 3. Add goods " ); 
        System.out.println ( " 4. modify goods " ); 
        System.out.println ( "5. exit" ); 
        System.out.println ( "Please enter your choice" );
    }
    
    public static void addGoods(ArrayList<Goods>List) { 
        System.out.println ( "Please enter a new number of fruits" ); 
        Scanner SC = new new Scanner (the System.in);
         int GID = sc.nextInt (); 
        System.out.println ( "Please enter a new fruit the name " ); 
        String gname = sc.next (); 
        System.out.println ( " Please enter the new price of fruit " );
         Double prize = sc.nextDouble ();
 //         it attributes to the package object commodity 
        goods goods = new new Goods (); 
        goods.gid = GID; 
        goods.gname = gname; 
        goods.prise= Prize;
 //         objects stored set 
        List.add (Goods); 
        
    } 
    
    public  static  void getGoods (the ArrayList <Goods> List) { 
        System.out.println ( "product inventory ===== ===== === " ); 
        System.out.println ( " product Code \ t trade name \ t commodity price " );
         for ( int I = 0; I <list.size (); I ++ ) { 
            System.out.println ( List.get (I) .gid + "\ T" + List.get (I) .gname + "\ T" + List.get (I) .prise); 
            
        }     
    } 
    public  static  void updateGoods (the ArrayList <Goods> List) { 
        getGoods ( list);
        System.out.println ( "Please enter the number you want to modify product" ); 
        Scanner sc = new new Scanner (System.in);
         int gid = sc.nextInt (); 
        System.out.println ( "Please enter your want to modify trade name " ); 
        String gname = sc.next (); 
        System.out.println ( " Please enter your want to modify commodity price " );
         Double prize = sc.nextDouble ();
         for ( int i = 0; i <list.size (); I ++ ) {
             IF (List.get (I) == .gid GID) { 
                List.get (I) .gname =  gname;
                List.get (I) .prise=prise;
            }
            
        }
    }
    public static void deleteGoods(ArrayList<Goods> list){
        getGoods(list);
        System.out.println("");
        Scanner sc=new Scanner(System.in);
        int gid=sc.nextInt();
        for(int i=0;i<list.size();i++){
            if(list.get(i).gid==gid){
                list.remove(i);
            }
            
        }
    }
}
Print results: