[hardwired]

Code:

import javax.swing.JOptionPane;

public class AnExample {
    public static void main(String[] args) {
        DataAcquisition controller = new DataAcquisition();
        // Create one PersonData:
        PersonData person = new PersonData();
        person.name = controller.getName();
        person.address = controller.getAddress();
        person.age = controller.getAge();
        person.interests = controller.getInterests();
        System.out.println("person = " + person);
    }
}

/** controller class */
class DataAcquisition {
    public String getName() {
        return getData("name");
    }

    public String getAddress() {
        return getData("address");
    }

    public int getAge() {
        return Integer.parseInt(getData("age"));
    }

    public String getInterests() {
        return getData("interests");
    }

    private String getData(String subject) {
        String s = "Enter " + subject;
        String retVal = JOptionPane.showInputDialog(s);
        if(retVal != null)
            return retVal;
        return "unknown";
    }
}

/** definition (aka data store) class */
class PersonData {
    String name;
    String address;
    int age;
    String interests;

    public String toString() {
        return "PersonData[name:" + name +
                      " address:" + address +
                          " age:" + age +
                    " interests:" + interests + "]";
    }
}