如何从Firebase获取字符串和整数？

你好！

我正在使用Firebase制作测验应用程序。我使用String来获取firebase值：

private String question;
private String answerOne;
private String answerTwo;
private String answerThree;
private String answerFour;
private String correctAnswer;

public ChoiceQuestion(String question, String answerOne, String answerTwo, String answerThree, String answerFour, String correctAnswer) {
    this.question = question;
    this.answerOne = answerOne;
    this.answerTwo = answerTwo;
    this.answerThree = answerThree;
    this.answerFour = answerFour;
    this.correctAnswer = correctAnswer;
}

public ChoiceQuestion() {

}

public String getQuestion() {
    return question;
}

public void setQuestion(String question) {
    this.question = question;
}

public String getAnswerOne() {
    return answerOne;
}

public void setAnswerOne(String answerOne) {
    this.answerOne = answerOne;
}

public String getAnswerTwo() {
    return answerTwo;
}

public void setAnswerTwo(String answerTwo) {
    this.answerTwo = answerTwo;
}

public String getAnswerThree() {
    return answerThree;
}

public void setAnswerThree(String answerThree) {
    this.answerThree = answerThree;
}

public String getAnswerFour() {
    return answerFour;
}

public void setAnswerFour(String answerFour) {
    this.answerFour = answerFour;
}

public String getCorrectAnswer() {
    return correctAnswer;
}

public void setCorrectAnswer(String correctAnswer) {
    this.correctAnswer = correctAnswer;
}

显然，我从firebase获取值的方法仅包含字符串。例如，在问题1中，我要所有答案文本。但是问题2，我希望所有答案都为NUMBER，但是我无法获得此数字，因为我的方法是String而不是Int（您能理解吗？），我需要一种方法来获取这两种类型的变量！

谢谢！