package cn.itcast_09;

import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;

/*
 * BufferedReader
 *     |--LineNumberReader
 *       public int getLineNumber():获取当前行号
 *       public void setLineNumber(int lineNumber):设置当前行号
 */
public class LineNumberReaderDemo {
  public static void main(String[] args) throws IOException {
    LineNumberReader lnr = new LineNumberReader(new FileReader("my.txt"));

    // 从10开始比较好
    lnr.setLineNumber(10);

    String line = null;
    while ((line = lnr.readLine()) != null) {
      System.out.println(lnr.getLineNumber() + ":" + line);
    }

    // 释放资源
    lnr.close();
  }
}