java - 从每一行中获取第一个词？

Question

很难从每一行中提取第一个词。任何想法为什么它输出空白文件？

程序将以下文本作为输入:

abecedism   word created from the initials of words in a phrase
ablaut  variation in root vowel of words to change meaning
acronym word formed from initial letters of another word
acrophonic  using a symbol for the initial sound of a thing
acroteleutic    phrase or words at the end of a psalm
adversative word or phrase expressing opposition

目标是让结果看起来像这样:

abecedism   
ablaut  
acronym 
acrophonic  
acroteleutic    
adversative 

目前的代码如下:

public static void main(String args[]) {
    String fileNameOutput = "OutputFile.txt";
    String fileName = "InputWords.txt";
    Charset cs = Charset.defaultCharset();
    try (BufferedReader bReader = Files.newBufferedReader(Paths.get(fileName), cs)) {
        PrintWriter outputStream = new PrintWriter(fileNameOutput);
        int lineNum = 0;
        String line = null;
        while ((line = bReader.readLine()) != null) {
            lineNum++;
            if (line.split(" ").length > 1) continue;
            outputStream.println(line);
        }
        outputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Answer 1

问题出在这里:

if (line.split(" ").length > 1) continue;

每行有1个以上的空格，所以代码:

outputStream.println(line.split(" ")[0]);

永远不会执行，因为 continue 直接跳到下一个 while 迭代所以删除 if (line.split("").length > 1) continue; 检查

编辑在打印消息中添加 line.split("")[0] 以仅获取第一个单词