java中的多字扫描仪输入

Question

因此，我尝试使用依赖于用户输入的if-else语句。当用户的输入只有一个单词时，它就工作了，但是，多个单词的输入无法识别并触发else语句。我该如何解决此问题？

导入java.util.Scanner；
公共类MyFirstJavaClass｛
public static void main(String[] args) {
    @SuppressWarnings("resource")
    Scanner myScanner = new Scanner(System.in);
    String answer;
    System.out.println("Catch the tiger or run away?");
    answer = myScanner.next();

         if (answer.equals("Catch the tiger"  )) {
            System.out.println("You've been mauled by a tiger! What were you thinking?");
            answer = myScanner.next();          
    } else {
        System.out.println("run away");
    }
  }
}

Answer 1

替换：

answer = myScanner.next();

带有：

answer = myScanner.nextLine();

next将只读取下一个值，直到它到达空格或换行符。在进行比较之前，您需要阅读整行

Answer 2

试试这个：

Scanner scanner = new Scanner(System.in);
int choice = 0;
while (scanner.hasNext()){
    if (scanner.hasNextInt()){
        choice = scanner.nextInt();
        break;
    } else {
        scanner.next(); // Just discard this, not interested...
    }
}

参考：在读取之前刷新/清除System.in（stdin）

Answer 3

试试这个

import java.util.Scanner;
public class MyFirstJavaClass {
    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner myScanner = new Scanner(System.in);
        System.out.println("Catch the tiger or run away?");
        if (myScanner.hasNext("Catch the tiger")) {
            System.out.println("You've been mauled by a tiger! What were you thinking?");
        } else {
            System.out.println("run away");
        }
    }
}