Write a Program in java for selecting Special Columns in a file which separated by space

/* open a file which includes columns separeted by "  "  and copy all content in other file  which  fields  separated by "," */ import  java.io.*; import  java.util.*; class SeparateColumns {       public static void main(String  args[]){             File inFile= new File("G:/Sign-Code/cpi.txt");             File outFile=new File("G:/Sign-Code/cccpi.txt");             FileReader ins= null;             FileWriter outs=null;             BufferedReader br=null;             BufferedWriter bw=null;                         try { ins=new  FileReader(inFile);                   outs=new FileWriter(outFile);                   br=new BufferedReader(ins);                   bw=new BufferedWriter(outs);                   String temp[]=new String[7];  // shows number of column=7                   String str;                   while((str=br.readLine())!=null){                     temp= str.split("\t");                     bw.write(temp[0]);                     bw.append(",");                     bw.write(temp[1]);                     bw.append(",");                     bw.write(temp[2]);                     bw.append(",");                     bw.write(temp[3]);                     bw.append(",");                     bw.write(temp[4]);                     bw.append(",");                     bw.write(temp[5]);                     bw.append(",");                     bw.append(temp[6]);                     bw.newLine();}                     }catch(IOException e){}                     finally {                           try {                                 br.close();                                 bw.close();} catch(IOException e){}                                                                                         }                 }       }