Hi Guys how are you all?

I'm trying to create a program which takes its input from standard input or a named file and puts its output on standard output or in another named file. I have the following code so far, any suggestions on what i'm doing wrong.

Code:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;


public class DeleteField 
{
  public static void main(String args[]) 
  {
    // Divide the line into fields using tab as a delimiter
      String[] fields = inputLine.split("\t");
      String editedLine = "";
      if (fields.length < fieldToDelete)
        editedLine = inputLine;
      else
      {
        // We build the new line in parts
	// Add the fields before the one to be deleted.
	for (int index = 0; index < fieldToDelete - 1; index++)
	  if (editedLine.equals("")) editedLine = fields[index];
	  else                       editedLine += "\t" + fields[index];
	// Add the fields after the one to be deleted.
	for (int index = fieldToDelete; index < fields.length; index++)
	  if (editedLine.equals("")) editedLine = fields[index];
	  else			     editedLine += "\t" + fields[index];
      } // else
    
    try 
    {
      int delete = Integer.parseInt(args[0]); 
      // parsing delete
      BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in));
      PrintStream printStream = new PrintStream(System.out);
      String string = new String();
      while ((string = bufferRead.readLine()) != null) 
      { 
        // reads the line
        String fields[] = string.split("\t"); 
	  // split the line
          for(int i=0;i < fields.length; i++) 
	  {
            if ((i+1) != delete) 
	    { 
	      // if first number equals deleteField number avoid printing, otherwise, print
              printStream.print(fields[i] + "\t");
            }
          }

          printStream.println();
	  
      } // while
   } // try
   
   catch (IOException exception) 
   {
     System.out.println("Error!" + exception.getMessage());
   } // catch
   
   
 } // main
} // class DeleteField
Any suggestions? I dont know how to declare variables whether they should be public or whatever. It's really annoying me now, and I need some help with it otherwise i'll fail first year

Kind regards

Shyam