每行的第一个字

Question

嗨，我有这段代码可以打印每行的最后一个单词，我想要执行与该代码完全相同的操作，但是带有第一个单词（不要嘲笑我，我不是程序员）

private static void readFile1(String in, String out) throws IOException
{
    FileInputStream fis = new FileInputStream(new File(in));

    BufferedReader br = new BufferedReader(new InputStreamReader(fis));

    BufferedWriter writer = null;

    writer = new BufferedWriter(new OutputStreamWriter(
          new FileOutputStream(out), "utf-8"));

    String line = null;
    while ((line = br.readLine()) != null)
    {
        if(line.length() > 0)
        {
            String[] words = line.split("\\s+");
            //System.out.println(words[words.length - 1]);
            writer.write(words[words.length - 1]);
            writer.newLine();
        }          
    }

    br.close();
    writer.close();
    fis.close();
}

Answer 1

代替：

writer.write(words[words.length - 1]);

采用

writer.write(words[0]);//assuming you wont have empty line.

如果可以有空行，请尝试使用：

if (words.length != 0) {
    writer.write(words[0]);
}

Answer 2

更换：

writer.write(words[words.length - 1]);

与：

writer.write(words[0]);

干杯!

Answer 3

替换为： writer.write(words[words.length - 1]);
使用： writer.write(words[0]);
或使用：
while((line = br.hasNextLine())) {... writer.write(words[0]); ...}