LineNumberReader的使用：行号的设置与获取

LineNumberReader的使用

   public int getLineNumber()获得当前行号。

   publicvoid setLineNumber(int lineNumber)：设置行号

import java.io.FileReader;

import java.io.IOException;

import java.io.LineNumberReader;

 

/*

 *BufferedReader

 *             |--LineNumberReader

 *                      public int getLineNumber()获得当前行号。

 *                      public voidsetLineNumber(int lineNumber)

 */

public class LineNumberReaderDemo {

         publicstatic void main(String[] args) throws IOException {

                   LineNumberReaderlnr = new LineNumberReader(new FileReader("a.txt"));

 

                   //从10开始才比较好

                   lnr.setLineNumber(10);

 

                   //System.out.println(lnr.getLineNumber());

                   //System.out.println(lnr.getLineNumber());

                   //System.out.println(lnr.getLineNumber());

 

                   Stringline = null;

                   while((line = lnr.readLine()) != null) {

                            System.out.println(lnr.getLineNumber()+ ":" + line);

                   }

 

                   lnr.close();

         }

}