Making It Case Insensitive

Question

Hi All,
Deepak here
I am working on a code to match the particular pattern in the File.
I do have the code for it but its case sensitive can any tell me how do i make it case in-sensitive
I have the code bellow
import java.io.*;
import java.util.regex.*;
public class FileMatcher
     public static void findMatchedLines( final File aFile,final File fout,FileWriter outs )
     Pattern regexp = Pattern.compile("Name");               //Compile the Pattern to be used by Matcher.
     Matcher matcher = regexp.matcher("");     // <----- Doubt Here //using regex to match it to the data in the File
     LineNumberReader lineReader = null;
          try
          lineReader = new LineNumberReader( new FileReader(aFile) ); //LineNumberReader reads Line on File,
          lineWriter = new LineWriter(args[1])                                        // used to specify Line @ which match Found
          String line = null;
          while ((line = lineReader.readLine()) != null)          //Reader the Line of File.
     {          System.out.println("Line="+line);
          matcher.reset( line );                          //reset the input
          if ( matcher.find() )                         //Callin Find method 4 results of comparision.
          outs.write(line);     
               //String msg = "Line " + lineReader.getLineNumber() + " is Matched: " + line;//Displable Msg.
          //throw new IllegalStateException(msg);
               //System.out.println(msg);                    //Displaying the Msg
               else
                    System.out.println("Match Not Found");          //Else Case
     catch (FileNotFoundException ex)
     ex.printStackTrace();
     catch (IOException ex)
     ex.printStackTrace();
     finally
     try
     if (lineReader!= null) lineReader.close();
     catch (IOException ex)
     ex.printStackTrace();
public static void main (String [] args)
final File fin=new File(args[0]);               //Creating the File object with name obtained from argument.
File fout=new File(args[1]);
try
FileWriter outs=new FileWriter(fout);
FileMatcher.findMatchedLines(fin,fout,outs);               //call user-defined findMatchedLines method with input File Object.
//FileMatcher.findMatchedLines(fin,fout);
catch(IOException e)
}                                        //final File fout=new File(args[1]);
                                        //FileWriter outs=new FileWriter(fout);
Need Help !!!
Cheers
Deepak

Answer 1

All you do is compare in the same case i.e. temporarily convert what you are comparing into the same case as what it is being compared with. There are API methods for this. Dont quote me on this but I think (from memory) they are part of the String package and they are to toUpper() and toLower() but like i said thats from memory so best if you look it up in the API docs yourself.
so...
if( yourregexpr.toUpper().equals(stringBeingChecked.toUpper()) ){
   //do whatever
}