java - 如何在没有空格的情况下进行扫描仪输入

Question

我有一个作业问题需要我写一个

Program that takes three names and their scores from a user by using delimiters. Example:

Tom:54, Matt:12, Ali:89

当 Java 分配 user2Score 时，我不断收到输入不匹配异常。我目前正在测试我的程序，但扫描仪似乎将 user2 视为 "Matt" 而不是 "Matt"。我不确定我的分隔符语法是否正确。如有任何反馈，我们将不胜感激!

import java.util.Scanner;

public class General {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in).useDelimiter("[: | ,*\\s]");

        String user1;
        String user2;
        String user3;

        int user1Score;
        int user2Score;
        int user3Score;

        System.out.println("Please enter the user name and their score:");
        user1 = input.next();
        user1Score = input.nextInt();
        user2 = input.next();
        user2Score = input.nextInt();
        user3 = input.next();
        user3Score = input.nextInt();


        System.out.println(user1 + " " + user1Score + "\n" + user2 + " " + user2Score);
    }

}

Answer 1

您可以使用字符串的trim()方法。这会消除字符串开头和结尾的所有空格。