Question

我正在尝试将字符串拆分为数组。这应该很好，因为str.split(" ")应该可以正常工作，但是字符串实际上是"xyz 100b\nabc 200b\ndef 400b"的形式。我想知道解决这个问题的最佳方法是什么。我还需要以它们给出的格式返回4个字符串。下面是我现在尝试的方法，但是没有正确地拆分数组。我的目标是将数组拆分为["xyz", "100b", "abc", "200b", "def", "400b"]

public static String solution(String words){
    String array[] = words.split(" ");

    /*
    There's a lot of other code manipulating the array to get 4 figures in the
    end. This doesn't matter, it's just splitting the array and the return that
    is my issue
    In the end I will have 4 integers that I want to return in a similar way
    that they gave them to me.
    */

    return "answer 1" + String.valueOf(num1) + "b\n" + 
           "answer2 " + String.valueOf(num2) + "b\n" +
           "answer 3" + String.valueOf(num3) + "b\n" + 
           "answer4 " + String.valueOf(num4) + "b\n";

}

编辑：

String array [] = str.split("\n| ")将根据需要拆分数组，谢谢A.Oubidar

Answer 1

希望我能正确理解您的问题，但是如果您要提取数字并以特定格式返回它们，可以这样：

suspend fun getCharacterFilms(serverRequest: ServerRequest) = ok()
        .bodyAndAwait(starWarsApiWebClient.findCharacter(serverRequest.pathVariable("id").toInt())
                .flatMapMerge {
                    it.films.asFlow()
                }.flatMapMerge {
                    starWarsApiWebClient.findFilm(it)
                })

这是执行后答案的值：

    // Assuming the String would be like a repetition of [word][space][number][b][\n]
    String testString = "xyz 100b\nabc 200b\ndef 400b";

    // Split by both endOfLine and space
    String[] pieces = testString.split("\n| ");

    String answer = "";

    // pair index should contain the word, impair is the integer and 'b' letter
    for (int i = 0; i < pieces.length; i++) {
        if(i % 2 != 0 ) {
            answer = answer + "answer " + ((i/2)+1) + ": " + pieces[i] + "\n";
        }
    }
    System.out.println(answer);

Answer 2

您应该将此代码放在“返回”中，而不是已经存在的代码中。

    return "answer 1" + array[0] + "b\n" + 
       "answer 2 " + array[1] + "b\n" +
       "answer 3" + array[2] + "b\n" + 
       "answer 4 " + array[3] + "b\n";

Answer 3

split()方法使用一个正则表达式作为参数。这：input.split("\\s+")将在空白处分割（\ s =空格，+ = 1或更大）。
您的问题尚不清楚，但是如果您要提取'100'，'200'等，则正则表达式也非常有用。您可以将每行插入正则表达式以提取值。有很多教程（对于“ java regexp示例”，仅是Google）。

用空格和换行分割字符串

3 个答案: