hi friend,

In your code you are only initializing the value and you are not getting the value try the modified code may this will be helpful for you.

UserName.java

package roseindia.net.example;

public class UserName {
    protected String ivFirstName, ivLastName;

    public UserName(String first, String last) {
    ivFirstName = first;
    ivLastName = last;
    }

    public String getUserName()
    {
        return ivFirstName+" "+ivLastName;
    }

    public String getFirstName() {
        return ivFirstName;
        }

    public String getLastName() {
    return ivLastName;
    }
    }

User.java

package roseindia.net.example;
public class User {
    protected String ivFirstName = "Java";
    protected String ivLastName = "Developer";

    /**
    * This is returning a single Object, which contains
    * multiple values.
    */
    public String getName() {
     UserName un = new UserName(ivFirstName, ivLastName);
     return un.getUserName();

    }
    }

Driver.java

package roseindia.net.example;

public class Driver {
    public static void main (String[] args) {
    User method = new User();
    System.out.println(method.getName());
    }
    }

hi

modify your Driver.java class as

public class Driver {
    public static void main (String[] args) {
    User method = new User();
    System.out.println(method.getName().getFirstName()+
    " "+ method.getName().getLastName());
    }
    }