Loop期望输入，但它应该遍历先前输入的每个单词

Question

需要将以元音开头的每个单词更改为最长的单词。一切似乎都不错，但是当我进入循环时，它遇到了循环中的意外行为-扫描程序需要输入（第7行）。而不是要求输入，它应该遍历我之前设置的句子（第二行）中的每个元素（单词）。我确实以为我错过了一些东西。

    Scanner sc = new Scanner(System.in);
    String textToFormat = sc.nextLine();
    Pattern pattern = Pattern.compile(regex);
    Matcher matcher = pattern.matcher(textToFormat);

    while (sc.hasNext()) {
      currentWord = sc.next();
      if (currentWord.length() > longestWord.length()) {
        longestWord = currentWord;

      } else break;
    }

Answer 1

通过查看您的代码，我发现您正在尝试查找用户输入的句子中最长的字符串。您只需输入整行，就无需单独输入每个单词。类似于以下代码的内容可以为您提供帮助：

import java.util.Scanner;

public class Main {

    public static String findLongestWord(String[] arr){
        String longest = "";
        for (String current : arr){
            // If the current word is larger than the longest.
            if(current.length() > longest.length()){
                longest = current; // Then set longest word to current.
            }
        }
        return longest;
    }

    public static void main(String[] args) {
        // Get the sentence from the user.
        System.out.println("Input a sentence: ");
        Scanner scan = new Scanner(System.in);
        String s = scan.nextLine();
        // Split sentence into words.
        String[] arr = s.split("\\W+");
        System.out.println("Longest word is " + findLongestWord(arr));
    }
}

[使用输入Find the longest word in this large sentence运行时，输出：

Input a sentence: 
Find the longest word in this large sentence.
Longest word is sentence