package com.corejsf;public class Problem {   private String question;   private String answer;   public Problem(String question, String answer) {      this.question = question;      this.answer = answer;   }      public String getQuestion() { return question; }   public String getAnswer() { return answer; }   // override for more sophisticated checking   public boolean isCorrect(String response) {      return response.trim().equalsIgnoreCase(answer);   }}