how to add a string parameter of an object in a List
import java.util.*;
public class EShop
{
public static String name;
public static Owner owner;
public static User user;
ArrayList<Item> itemsList = new ArrayList<Item>();
ArrayList<Buyer> buyersList = new ArrayList<Buyer>();
ArrayList<String> emailList =new ArrayList<String>();
EShop (String name,Owner owner)
{
this.name=name;
this.owner=owner;
}
void addItem(Item item)
{
if (itemsList.contains(item)) System.out.println("Item already exists");
else itemsList.add(item);
}
/*Item getItemById(int id)
{
Item item;
for(int i=0;i<itemsList.size();i++)
{
if (itemsList.get(i).id==id) item=itemsList.get(i);
//else System.out.println("Item does not exist.");
}
return item;
}*/
Item getItemById(int id)
{
for(Item item:itemsList)
{
if (item.getItemId()==id) {return item;}
}
System.out.println("Item does not exist.");
return null;
}
void removeItem(Item item)
{
if (itemsList.contains(item)) itemsList.remove(item);
else System.out.println("Item does not exist");
}
void addBuyer(Buyer buyer)
{
if (buyersList.contains(buyer.email)) System.out.println("Buyer already exists");
else buyersList.add(buyer); emailList.add(user.email);
}
void removeBuyer(Buyer buyer)
{
if (buyersList.contains(buyer)) buyersList.remove(buyer);
else System.out.println("Buyer does not exist");
}
//public List<String> getList() {return emailList;}
void updateItemStock(Item item,int stock)
{
item.stock=stock;
}
void showCategories()
{
int countPen=0;int countPencil=0;int countNotebook=0;int countPaper=0;
for (int i=0;i<itemsList.size();i++)
{
if (itemsList.get(i) instanceof Pen){countPen++;}
if (itemsList.get(i) instanceof Pencil){countPencil++;}
if (itemsList.get(i) instanceof Notebook){countNotebook++;}
if (itemsList.get(i) instanceof Paper){countPaper++;}
}
System.out.println("Categories: 1.Pen("+countPen+")\n2.Pencil("+countPencil+")\n3.Notebook("+countNotebook+")\n4.Paper("+countPaper+")");
}
void showProductsInCategory(String category)
{
boolean CategoryNotFound=false;
System.out.println("Items in category "+category+":");
for (int i=0;i<itemsList.size();i++)
{
if (category=="Pen"){if (itemsList.get(i) instanceof Pen)
{System.out.println(i+"."+itemsList.get(i).name);}}
else if (category=="Pencil"){if (itemsList.get(i) instanceof Pencil)
{System.out.println(i+"."+itemsList.get(i).name);}}
else if (category=="Notebook"){if (itemsList.get(i) instanceof Notebook)
{System.out.println(i+"."+itemsList.get(i).name);}}
else if (category=="Paper"){if (itemsList.get(i) instanceof Paper)
{System.out.println(i+"."+itemsList.get(i).name);}}
else CategoryNotFound=true;
}
if (CategoryNotFound==true)System.out.println("Could not find that category.");
}
void showProduct(Item item)
{
System.out.println(item.toString());
}
void checkStatus()
{
System.out.println("Status for all clients: ");
for (int i=0;i<buyersList.size();i++)
{
System.out.println("Name: "+buyersList.get(i).name+" Bonus Collected: "+
buyersList.get(i).bonus+" Category: "+buyersList.get(i).buyerCategory);
}
}
}