在Java中读取文件,输出第一个以逗号分隔的String

Question

我想String使用分隔符","在文件中提取第一个.为什么此代码生成大于一行的行数？

public static void main(String[] args) {
    BufferedReader in = null;
    try {
        in = new BufferedReader(new FileReader("irisAfter.txt"));
        String read = null;
        while ((read = in.readLine()) != null) {
            read = in.readLine();
            String[] splited = read.split(",");
            for (int i =0; i<splited.length;i++) {
                System.out.println(splited[0]);
            } 
        }
    } catch (IOException e) {
            System.out.println("There was a problem: " + e);
            e.printStackTrace();
    } finally {
        try {
            in.close();
        } catch (Exception e) { e.printStackTrace(); }
    }
}

Answer 1

您正在循环内打印.这就是它多次打印的原因(如果这就是你所要求的).

String[] splited = read.split(",");    
System.out.println(splited[0]);

会做的

编辑:正如Abishek也提到的那样,不要read = in.readLine();再在你的while循环中了,因为你这样做是在跳过一条线.

while ((read = in.readLine()) != null) {
   String[] splited = read.split(",");
   System.out.println(splited[0]);
}