java - 在新行上拆分数组

Question

我正在通过标准输入提交以下输入:

4 2

30个

30 两个

15 三

25 四

我的代码是:

public static void main(String[] args) throws IOException {

        BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
        String submittedString;
        System.out.flush();
        submittedString = stdin.readLine();

        zipfpuzzle mySolver = new zipfpuzzle();
        mySolver.getTopSongs(submittedString);

    }

调用:

//Bringing it all together
    public String getTopSongs(String myString) {

        setUp(myString);
        calculateQuality();
        qualitySort();
        return titleSort();

    }

哪个调用

public void setUp(String myString) {

    String tempString = myString;

    //Creating array where each element is a line
    String[] lineExplode = tempString.split("\\n+");

    //Setting up numSongsAlbum and songsToSelect
    String[] firstLine = lineExplode[0].split(" ");
    numSongsAlbum = Integer.parseInt(firstLine[0]);
    songsToSelect = Integer.parseInt(firstLine[1]);

    System.out.println(lineExplode.length);
//etc
}

但是，由于某些原因，lineExplode.length 返回值 1...有什么建议吗？

亲切的问候，达里奥

Answer 1

String[] lineExplode = tempString.split("\\n+");

String#split 的参数是一个包含正则表达式的字符串