我在更换我的字符串时遇到问题。
这是 Question 类方法。
public class Question
{
private String text;
private String answer;
/**
Constructs a question with empty question and answer.
*/
public Question(String qText)
{
text = qText;
answer = "";
}
/**
Sets the answer for this question.
@param correctResponse the answer
*/
public void setAnswer(String correctResponse)
{
answer = correctResponse;
}
/**
Checks a given response for correctness.
@param response the response to check
@return true if the response was correct, false otherwise
*/
public boolean checkAnswer(String response)
{
return response.equals(answer);
}
/**
Displays this question.
*/
public void display()
{
System.out.println(text);
}
}
这是我的方法
This is my blankQuestions class
import java.util.ArrayList;
public class BlankQuestion extends Question {
public BlankQuestion(String qText) {
return qText.replaceAll("_+\\d+_+", "_____");
String tempSplit[] = questionText.split("_");
setAnswer(tempSplit[1]);
}
public void setAnswer(String correctChoice){
super.setAnswer( correctChoice );
}
@Override
public boolean checkAnswer (String response){
return super.checkAnswer(response);
}
public String toString(){
return super.toString();
}
}
这是我的主要课程
import java.util.Scanner;
public class QuestionDemo
{
public static void main(String[] args)
{
Question[] quiz = new Question[2];
BlankQuestion question0 = new BlankQuestion(
"2 + 2 = _4_");
quiz[0] = question0;
BlankQuestion question1 = new BlankQuestion(
"The color of the sky is _blue_.");
quiz[1] = question1;
Scanner in = new Scanner(System.in);
for (Question q : quiz)
{
q.display();
System.out.println("Your answer: ");
String response = in.nextLine();
System.out.println(q.checkAnswer(response));
}
}
}
据我了解，我将 [underscore]4[underscore] 替换为 5x[underscore]，这类似于填充空白，我存储 4. 并将字符串的一部分替换为_ __ _ _。Unfortado，这就是我的结果。我认为我的逻辑是正确的，但我不知道为什么我的回报不是我所期望的。