java 如何使用java使用scanner类回答带有字符串的问题？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4986353/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to answer a question with a string using the scanner class using java?
提问by Cferrel
I have been trying all weekend to find a way to get my program to answer a question using a sting with a scanner class. For example I need to get my program to answer a question like
我整个周末都在尝试找到一种方法，让我的程序使用扫描仪类的刺来回答问题。例如，我需要让我的程序回答这样的问题
Who is on the 5 dollar bill?
5 美元的钞票上是谁？
Input would be Lincoln and other inputs would be invalid the question will have 3 choices so the logic has to work.
输入将是林肯，其他输入将无效，问题将有 3 个选择，因此逻辑必须起作用。
Can you point me in the right direction on how to get this to work in Java? I want to understand the material but I have really tried all weekend.
你能指出我如何让它在 Java 中工作的正确方向吗？我想了解材料，但我整个周末都在尝试。
回答by Hanna
If I understood your question properly, then this should point you in the right direction:
如果我正确理解了您的问题，那么这应该为您指明正确的方向：
Import the Scanner:
导入扫描仪：
import java.util.Scanner;
Then, here is the method you'd want to call:
然后，这是您要调用的方法：
public void myScanner () {
Scanner scan = new Scanner(System.in); //Creates a new scanner
System.out.println("Who is on the 5 dollar bill?"); //Asks question
String input = scan.nextLine(); //Waits for input
if (input.equalsIgnoreCase("Lincoln")) { //If the input is Lincoln (or any case variant of Lincoln)
System.out.println("Correct!");
}
else { //If the input is anything else
System.out.println("Incorrect!");
}
}
回答by donnyton
If you don't want to encode all the actual word solutions (like "Lincoln") you can also just ask the user to pick a number/letter solution since you only have 3.
如果您不想编码所有实际的单词解决方案（如“林肯”），您也可以要求用户选择一个数字/字母解决方案，因为您只有 3 个。
Scanner input = new Scanner(System.in);
System.out.println("Who is on the 5 dollar bill? 1. Lincoln 2. Somebody 3. Someone");
String userChoice = scan.nextInt(); //get a number from user
if(userChoice == 1)
System.out.println("Correct answer!");
else
System.out.println("Wrong answer!");
This would make it easy to keep track of the answer key.
这将使跟踪答案密钥变得容易。
