int location = // the location of the person in your ArrayList
    Person stored = (Person)myList.get(location);
    JTextArea tArea = new JTextArea();
    String in = stored.getName() + "\n" + stored.getLastName();
    tArea.setText(in);

          public String toString() {
            StringBuffer sb = new StringBuffer();
            sb.append("Animal:");
            sb.append("name=");
            sb.append(name);
            sb.append(",");
            sb.append("price=");
            sb.append(price);
            sb.append("|");
            return sb.toString();
        }

        public String toString() {
            StringBuffer sb = new StringBuffer();
            sb.append("Purchase:");
            sb.append("Date=");
            sb.append(date);
            sb.append(",");
            sb.append(animal);
            return sb.toString();
        }

        public String toString() {
            StringBuffer sb = new StringBuffer();
            sb.append("Supplier:");
            sb.append("name=");
            sb.append(name);
            sb.append(",");
            for (Purchase inner : purchaseList) {
                sb.append(inner);
            }
            return sb.toString();
        }

         public String toString() {
            StringBuffer sb = new StringBuffer();
            sb.append("Owner:");
            //TODO
            return sb.toString();
        }

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
 
public class Superstar {
 
    Owner owner;
 
    public Superstar() {
        owner = new Owner();
        String supplierName = "Smith";
        Date date = new Date();
        String animalName = "dog";
        int price = 100;
        owner.add(supplierName, date, animalName, price);
        date = new Date();
        long time = date.getTime() - 8888888888L;
        date.setTime(time);
        owner.add(supplierName, date, "cow", 1000);
        owner.add("Byron", date, "cat", 5);
        System.out.println(owner);
        //first simple question
        int numberOfSales = owner.getNumberOfSales();
        System.out.println("numberOfSales=" + numberOfSales);
 
    }
    public static void main(String[] args) {
        new Superstar();
    }
}

    public class Owner {
 
        private List<Supplier> supplierList = new ArrayList<Supplier>();
 
        // by name
        public Supplier getSupplier(String supplierName) {
            for (Supplier inner : supplierList) {
                if (inner.getName().equals(supplierName)) {
                    return inner;
                }
            }
            return (Supplier) null;
        }
 
        public void add(String supplierName, Date currDate, String animalName, int animalPrice) {
            Animal animal = new Animal(animalName, animalPrice);
            Purchase purchase = new Purchase(currDate, animal);
            // check for supplier
            Supplier supplier = getSupplier(supplierName);
            if (supplier == null) {
                supplier = new Supplier(supplierName, purchase);
                // add new suplier to supplierList
                supplierList.add(supplier);
            } else {
                //supplier exist,add 
                supplier.add(purchase);
            }
        }
 
        @Override
        public String toString() {
            StringBuffer sb = new StringBuffer();
            sb.append("Owner:");
            for (Supplier inner : supplierList) {
                sb.append("\n");
                sb.append(inner);
            }
            return sb.toString();
        }
 
        public int getNumberOfSales() {
            int numberOfSales = 0;
            for (Supplier inner : supplierList) {
                numberOfSales += inner.getNumberOfSales();
            }
            return numberOfSales;
        }
    }