Sample of Java Pattern -- Factory

Customer.java

package factory;

import java.io.Serializable;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

public class Customer implements Serializable {

    private Long customerId;
    private String firstName;
    private String lastName;
    private String address;
    private String city;
    private String postalCode;
    private String workPhone;
    private String homePhone;
    private String cellPhone;
    private String email;
    private Date createdOn;
    private Date updatedOn;
    private Set<Order> orders = new HashSet<Order>(0);
    
    public Long getCustomerId() {
        return customerId;
    }
    public void setCustomerId(Long customerId) {
        this.customerId = customerId;
    }
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
    public String getPostalCode() {
        return postalCode;
    }
    public void setPostalCode(String postalCode) {
        this.postalCode = postalCode;
    }
    public String getWorkPhone() {
        return workPhone;
    }
    public void setWorkPhone(String workPhone) {
        this.workPhone = workPhone;
    }
    public String getHomePhone() {
        return homePhone;
    }
    public void setHomePhone(String homePhone) {
        this.homePhone = homePhone;
    }
    public String getCellPhone() {
        return cellPhone;
    }
    public void setCellPhone(String cellPhone) {
        this.cellPhone = cellPhone;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public Date getCreatedOn() {
        return createdOn;
    }
    public void setCreatedOn(Date createdOn) {
        this.createdOn = createdOn;
    }
    public Date getUpdatedOn() {
        return updatedOn;
    }
    public void setUpdatedOn(Date updatedOn) {
        this.updatedOn = updatedOn;
    }
    public Set<Order> getOrders() {
        return orders;
    }
    public void setOrders(Set<Order> orders) {
        this.orders = orders;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((email == null) ? 0 : email.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Customer other = (Customer) obj;
        if (email == null) {
            if (other.email != null)
                return false;
        } else if (!email.equals(other.email))
            return false;
        return true;
    }

}

Order.java

package factory;

import java.io.Serializable;
import java.util.Date;

public class Order implements Serializable {

    private int orderId;
    private Customer customer;
    private String sku;
    private Date createdOn;
    private Date updatedOn;
    private int status;
    
    public int getOrderId() {
        return orderId;
    }
    public void setOrderId(int orderId) {
        this.orderId = orderId;
    }
    public Customer getCustomer() {
        return customer;
    }
    public void setCustomer(Customer customer) {
        this.customer = customer;
    }
    public String getSku() {
        return sku;
    }
    public void setSku(String sku) {
        this.sku = sku;
    }
    public Date getCreatedOn() {
        return createdOn;
    }
    public void setCreatedOn(Date createdOn) {
        this.createdOn = createdOn;
    }
    public Date getUpdatedOn() {
        return updatedOn;
    }
    public void setUpdatedOn(Date updatedOn) {
        this.updatedOn = updatedOn;
    }
    public int getStatus() {
        return status;
    }
    public void setStatus(int status) {
        this.status = status;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((sku == null) ? 0 : sku.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Order other = (Order) obj;
        if (sku == null) {
            if (other.sku != null)
                return false;
        } else if (!sku.equals(other.sku))
            return false;
        return true;
    }
}

DomainObjMgmt.java

package factory;

import java.util.Date;

public class DomainObjMgmt {
    public static Object create(String which){
        Object obj = null;
        if (which.equalsIgnoreCase("customer")) {
            Customer customer = new Customer();
            customer.setFirstName("firstName");
            customer.setLastName("lastName");
            customer.setAddress("address");
            customer.setCity("city");
            customer.setPostalCode("postalCode");
            customer.setWorkPhone("workPhone");
            customer.setHomePhone("homePhone");
            customer.setCellPhone("cellPhone");
            customer.setEmail("email");
            customer.setCreatedOn(new Date());
            customer.setUpdatedOn(new Date());
            obj = customer;
            System.out.println("Creating a customer, done.");
        }else if(which.equalsIgnoreCase("order")){
            Order order = new Order();
            order.setSku("sku");
            order.setCreatedOn(new Date());
            order.setUpdatedOn(new Date());
            obj = order;
            System.out.println("Creating an order, done.");
        }else{
            obj = null;
            System.out.println("Could not create this object");
        }
        return obj;
    }
}

FactoryTest.java

package factory;

public class FactoryTest {
    public static void main(String[] args) {
        Customer customer = (Customer)DomainObjMgmt.create("customer"); 
        Order order = (Order)DomainObjMgmt.create("order"); 
        DomainObjMgmt.create("advisor"); 
    }
}

you may download the source code.