rough work 1 file read and write

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package p1;

import java.io.BufferedReader;
import java.io.File;
import java.io.*;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.*;

/**
 *
 * @author sujith
 */
public class str3 {
    public static void main(String[] args){
        File file= new File("C:\\data3.txt");
        File file2=new File("C:\\data3.txt");
       // String[] tokens = null;
        int k=0;
        try{
        //BufferedReader br= new BufferedReader(new InputStreamReader(new FileInputStream(file)));
            // BufferedReader br= new BufferedReader(new FileReader(f));
            BufferedReader br= new BufferedReader(new InputStreamReader(new FileInputStream(file)));
            FileInputStream in= new FileInputStream("C:\\data3.txt");
            FileOutputStream op= new FileOutputStream("E:\\data5.txt");
            //InputStreamReader ip=new InputStreamReader(in);          
            //OutputStreamWriter op= new OutputStreamWriter(new FileOutputStream("E:\\data4.txt"));
            //BufferedReader br= new BufferedReader(in);
           // System.out.println(ip);
            while((k=in.read())!=-1){
                System.out.println((char)k);
               // op.write(k);
               // op.append((char)k);
               // System.out.println((byte)k);
              
            }
        String line=null;
        int count=0;
        int i=0;
       
        while((line=br.readLine())!=null){
            //tokens=line.split("\\s+");
            StringTokenizer st= new StringTokenizer(line," ");
          
           while(st.hasMoreTokens()){
               String s=st.nextToken();
               char c;
               StringBuffer sb=new StringBuffer(s);
              for(int j=0;j<sb.length();j++){
                  for(int m=j+1;m<sb.length();m++){
                     // System.out.println(sb.ch);
                      //sb.setCharAt(i, ch);
                      if(sb.charAt(j)>sb.charAt(m)){
                          c=sb.charAt(j);
                          sb.setCharAt(j,sb.charAt(m));
                          sb.setCharAt(m, c);
                      }
                    
                  }
              }
              System.out.println(sb);
               //System.out.println(st.nextToken());             
               //StringBuffer sb=new StringBuffer(st.nextToken());
               // StringBuilder sb= new StringBuilder(st.nextToken());
               //String sb=st.nextToken();
              // String[] sb=new String[]{st.nextToken()};
               //System.out.println(sb.length);
              // System.out.println(st.nextToken());
              
              // op.write(st.nextToken().getBytes());
              // op.write(" ".getBytes());
              
               //System.out.println(st.nextToken().getClass().getName());
             
               op.write(sb.toString().getBytes());
               op.write(" ".getBytes());
           }
            op.write("\n".getBytes());
          
        }
       

        }catch(Exception e){
            System.out.println(e);
        }
    }
   
}