Composition Demo

CompositionDemo.java

package com.art.fundamentals;

public class CompositionDemo {

  public static void main(String[] args) {
    Question firstQuestion = new Question("Who won 2018 World Cup ?", "France", "Croatia");
    Question secondQuestion = new Question("Who hosted 2018 World Cup ?", "Russia", "USA");

    System.out.println(firstQuestion);
    System.out.println(secondQuestion);
  }

}

class Question {
  private String question;
  private Option optionOne;
  private Option optionTwo;

  Question(String question, String option1, String option2) {
    this.question = question;
    this.optionOne = new Option(1, option1);
    this.optionTwo = new Option(2, option2);
  }

  @Override
  public String toString() {
    return "Question{" +
        "question='" + question + '\'' +
        ", optionOne=" + optionOne +
        ", optionTwo=" + optionTwo +
        '}';
  }
}

class Option{
  int id;
  String name;

  Option(int id, String name) {
    this.id = id;
    this.name = name;
  }

  @Override
  public String toString() {
    return "Option{" +
        "id=" + id +
        ", name='" + name + '\'' +
        '}';
  }
}