[英]How do I time the user input from a Scanner in Java, and place that input into a category based on certain time intervals?
I want the user to answer a question, but their input is timed from the prompt to when they press enter.我希望用户回答一个问题,但他们的输入是从提示到他们按下回车键的时间。 Then based on how long they took, I want that question and answer pair to be stored somewhere.
然后根据他们花了多长时间,我希望将问题和答案对存储在某个地方。
Question1: What is the powerhouse of the cell?问题一:细胞的动力源是什么? Answer: Mitochondria The answer is correct , and user took 6 seconds to press enter
Answer: Mitochondria The answer is correct , and user take 6 seconds to press enter 答案:线粒体答案正确,用户用了 6 秒按回车
Store Question1 into deck A (because all t<10 seconds should be in deck A)将 Question1 存储到 deck A(因为所有 t<10 秒都应该在 deck A 中)
Question2:What is inflammation in the cardiac muscle called?问题2:心肌的炎症叫什么? Answer: Myocarditis The answer is correct , and user took 15 seconds to press enter
答案:心肌炎答案正确,用户用了15 秒按回车
Store Question2 into deck C. (because all t >=15 seconds but less than 20 should be in deck C)将 Question2 存储到 deck C 中。(因为所有 t >=15 秒但小于 20 的时间都应该在 deck C 中)
I can program everything around this problem, I just can't seem to be able to time and store the user input based on that time.我可以围绕这个问题编写所有程序,但我似乎无法根据那个时间来计时和存储用户输入。 Any assistance would be great, thanks!
任何帮助都会很棒,谢谢!
I think you simply can save the time before and after you read the user input.我认为您可以简单地节省阅读用户输入前后的时间。 I created a small example for one of your questions:
我为你的一个问题创建了一个小例子:
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in); // Create a Scanner object
System.out.println("What is the powerhouse of the cell?"); // First question
long startTime = System.currentTimeMillis(); // Save start time
String answer = scanner.nextLine(); // Read user input
long endTime = System.currentTimeMillis(); // Save time after enter
long questionTime = (endTime - startTime) / 1000; // Calculate difference and convert to seconds
if (answer.equals("Mitochondria")) { // Check if answer is correct and print output
System.out.println("The answer is correct, and user took " + questionTime + " seconds to press enter");
} else {
System.out.println("The answer is wrong, and user took " + questionTime + " seconds to press enter");
}
}
}
Console log:控制台日志:
What is the powerhouse of the cell?
Mitochondria
The answer is correct, and user took 3 seconds to press enter
Right before asking, capture the current time using Instant.now()
;在询问之前,使用
Instant.now()
捕获当前时间;
Right after they press enter , capture the then current time using Instant.now()
;在他们按下enter后,立即使用
Instant.now()
捕获当时的当前时间;
Use Duration::between
to get the duration between those two instants.使用
Duration::between
获取这两个时刻之间的持续时间。
Format the Duration
to the desired format, eg将
Duration
格式化为所需的格式,例如
String.format("%ss and %sms", d.getSeconds(), d.toMillisPart())
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