我的布尔值总是正确的[关闭]答案

【问题标题】：My boolean always comes up correct [closed]我的布尔值总是正确的[关闭]
【发布时间】：2013-10-01 19:14:11
【问题描述】：

在我下面的一段代码中，我希望比较一段文本文件。但是，由于某种原因，无论用户在值中输入什么正确。

我正在尝试比较值而不担心它的大小写或任何前导或尾随空格。

// Display the question to the user
System.out.println("Question: " + myList.get(random1));

// Accept user input
System.out.print("Please type your answer: ");

// Store the user answer in a variable but lowercase
answer = scanner.nextLine().toLowerCase();
System.out.println();

// Display the officially correct answer from the arraylist
System.out.println("Answer: " + myList.get(random1 +1));

// if the user answer matches the official answer, tell them they're
// correct and award points
// else tell them they suck LOL
if(myList.get(random1 + 1).contains(answer) == false) {
    System.out.println("Correct!");
    totalScore = totalScore + awardedPoints;
    System.out.println("You won " + awardedPoints);
}
else {
    System.out.println("You suckkkkkkk");
}

// Display total accumulated points
System.out.println("Your total points are: " + totalScore);

// Wait for user to hit any key before displaying the next question
System.out.print("Hit Enter");
scanner.nextLine();

【问题讨论】：

建议：不要使用myList.get(random1 +1).contains(answer) == false，使用!myList.get(random1 +1).contains(answer)
myList 是如何定义的？什么是 random1？
如果官方答案不包含输入的答案，是否认为是正确的？
@ScottHunter 哦，好眼睛！
这个问题似乎跑题了，因为它太本地化了；问题中的代码检查条件是否为假，而不是检查条件是否为真。问题和答案不太可能对未来的访问者有用。

标签： java if-statement boolean

【解决方案1】：

试试这个。

// Display the officially correct answer from the arraylist
String correctAnswer =  myList.get(random1 +1); 
System.out.println("Answer: " + correctAnswer); // Instead use a variable

// if the user answer matches the official answer, tell them they're
// correct and award points
// else tell them they suck LOL
if(correctAnswer.equalIgnoreCase(answer)) { // efficient than contains() method
    System.out.println("Correct!");
    totalScore = totalScore + awardedPoints;
    System.out.println("You won " + awardedPoints);
}
else {
    System.out.println("You suckkkkkkk");
}

【讨论】：