Combine Columns in CSV file using JAVA -

i want combine columns in csv file using java here in file want combine first 2 columns "product no" , "product name".

this csv file

 productno,productname,price,quantity  1,java,300,5  2,java2,500,10  3,java3,1100,120 

here code

private void parseusingopencsv(string filename)   {    csvreader reader;    filewriter out = null;    csvwriter outt;    try    {   reader = new csvreader(new filereader(filename));   string[] row;     try {     out= new filewriter("e:/data/test/newww.csv");    } catch (ioexception e) {     // todo auto-generated catch block     e.printstacktrace();    }     try {     while ((row = reader.readnext()) != null)      {         (int = 0; < row.length; i++)          {             // display csv values               system.out.println(row[i]);             string com = row[i];              out.write(com);          }      } } catch (ioexception e) {     // todo auto-generated catch block     e.printstacktrace(); } }  catch (filenotfoundexception e)  {     system.err.println(e.getmessage()); }finally{   if (out != null) {       try {         out.close();     } catch (ioexception e) {         // todo auto-generated catch block         e.printstacktrace();     }    } }    } 

by using code output below

product no product name price 1 java 300 2 java2 500 3 java3 1100 

but want output this....

 productnoproductname,price,quantity  1java,300,5  2java2,500,10  3java3,1100,120 

while ((row = reader.readnext()) != null)  {     (int = 0; < row.length; i++)      {         // display csv values           system.out.print(row[i]);         string com = row[i];          out.write(com);      }  system.out.println(); } 

this breaks output after ove sv line writen