package com.corejsf;
public class QuizBean {
private int currentProblem;
private int tries;
private int score;
private String response;
private String correctAnswer;
// here, we hardwire the problems. In a real application,
// they would come from a database
private Problem[] problems = {
new Problem(
"What trademarked slogan describes Java development? Write once, ...",
"run anywhere"),
new Problem(
"What are the first 4 bytes of every class file (in hexadecimal)?",
"CAFEBABE"),
new Problem(
"What does this statement print? System.out.println(1+\"2\");",
"12"),
new Problem(
"Which Java keyword is used to define a subclass?",
"extends"),
new Problem(
"What was the original name of the Java programming language?",
"Oak"),
new Problem(
"Which java.util class describes a point in time?",
"Date")
};
public QuizBean() { startOver(); }
// PROPERTY: question
public String getQuestion() {
return problems[currentProblem].getQuestion();
}
// PROPERTY: answer
public String getAnswer() { return correctAnswer; }
// PROPERTY: score
public int getScore() { return score; }
// PROPERTY: response
public String getResponse() { return response; }
public void setResponse(String newValue) { response = newValue; }
public String answerAction() {
tries++;
if (problems[currentProblem].isCorrect(response)) {
score++;
nextProblem();
if (currentProblem == problems.length) return "done";
else return "success";
} else if (tries == 1) {
return "again";
} else {
nextProblem();
if (currentProblem == problems.length) return "done";
else return "failure";
}
}
public String startOverAction() {
startOver();
return "startOver";
}
private void startOver() {
currentProblem = 0;
score = 0;
tries = 0;
response = "";
}
private void nextProblem() {
correctAnswer = problems[currentProblem].getAnswer();
currentProblem++;
tries = 0;
response = "";
}
}
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