Supermarket operation support system - Software Development Case Studies in Java - page 369

public long code;
public String name;
public double price;
public long quantity;
Item( long code, String name,
double price, long quantity){
this. code # code;
this. name # name;
this. price # price;
this. quantity # quantity;
}
}
public class Customer {
public long code;
public String name;
Customer( long code, String name){
this. code # code;
this. name # name;
}
}
public class Employee {
public long code;
public String name;
public String password;
Employee( long code, String name, String password){
this. code # code;
this. name # name;
this. password # password;
}
}
public class Acquisition {
public long quantity;
public Item item;
Acquisition(Item item, long quantity){
this .item # item;
this .quantity # quantity;
}
}
import java.util.Vector;
public class Transaction {
public long code;
public Employee employee;
public Customer customer;
public boolean open;
public Vector acquisitions # new Vector();
Transaction( long code, Employee employee,
Customer customer){