MigratingValueFromAclassToBClass

public class Employee {
	
	private String id;
	private String firstName;
	private String lastName;
	private String address;
	private int age;
	//setter getter are hidden
}
 
 
public class User {
	private String id;
	private String firstName;
	private String lastName;
	private String address;
	private int age;
	//setter getter are hidden
	
}
 
 
 
import java.lang.reflect.Field;
public class MainApp {
 
	public static void main(String[] args) {
		Employee employee = new Employee();
		employee.setId("1");
		employee.setFirstName("adil");
		employee.setLastName("ramdan");
		employee.setAge(22);
		employee.setAddress("bandung");
		System.out.println(employee.toString());
 
		User user = new User();
		migratingValue(employee, user);
		user.setId("10");
		System.out.println(user.toString());
 
	}
 
	public static User migratingValue(Employee employee, User user) {
		Class employeeClass = employee.getClass();
		Class userClass = User.class;
 
		Field[] arrField = employeeClass.getDeclaredFields();
 
		for (Field field : arrField) {
			field.setAccessible(true);
			try {
				if (!field.getName().equals("id")) {
					Field userField = userClass.getDeclaredField(field
							.getName());
					userField.setAccessible(true);
					userField.set(user, field.get(employee));
				}
			} catch (Exception e) {
				// TODO Auto-generated catch block
			}
		}
		return user;
	}
}
 
 
//Hasilnya adalah sebagai berikut : 
Employee [id=1, firstName=adil, lastName=ramdan, address=bandung, age=22]
User [id=10, firstName=adil, lastName=ramdan, address=bandung, age=22]