Bir Kod Dosyasına Satır Sayısı Eklemek.

  1 package com.godoro.test;
  2 import java.io.*;
  3 public class LineTest {
  4   private File file;
  5   public LineTest(File file) throws Exception{
  6     this.file=file;
  7     String content=putLines();
  8     write(content);
  9   }
 10   public String putLines(){
 11     try{
 12       String line = null;
 13       FileReader reader=new FileReader(file);
 14       BufferedReader br=new BufferedReader(reader);
 15       StringBuffer buffer=new StringBuffer();
 16       int lineNumber=1;
 17       while ((line = br.readLine()) != null){
 18         buffer.append(lineNumber);
 19         buffer.append("\t");
 20         buffer.append(line);
 21         buffer.append("\n");
 22         lineNumber++;
 23       }
 24       br.close();
 25       return buffer.toString();
 26     }catch(FileNotFoundException e){
 27       e.printStackTrace();
 28       return null;
 29     }
 30     catch(IOException ei){
 31       ei.printStackTrace();
 32       return null;
 33     }
 34   }
 35   private void write(String content) throws Exception{
 36     String parent=file.getParent();
 37     FileWriter writer=new FileWriter(parent+"\\"+"line_"+file.getName(),false);
 38     writer.write(content);
 39     writer.close();
 40   }
 41   public static void main(String[] args){
 42     try{
 43       File file=new File("E:\\Zafer\\Ball.java");
 44       new LineTest(file);
 45     }catch(Exception e){
 46       e.printStackTrace();
 47     }
 48   }
 49 }

buffer.append(lineNumber);
buffer.append("\t");
buffer.append(line);
buffer.append("\n");
lineNumber++;