import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import javax.swing.JFileChooser;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.StreamTokenizer;
import javax.swing.JOptionPane;

public class BasicFile
{
		File f;
	   JFileChooser select;
      File f2 = new File(".", "File Backup");
      JFileChooser choose;

		public BasicFile()
		{
				choose = new JFileChooser(".");
		}
      
      public void selectFile()
      {
         int status = choose.showOpenDialog(null);
				
				try
				{
						if (status != JFileChooser.APPROVE_OPTION) 
							throw new IOException();
						f = choose.getSelectedFile();
						if (!f.exists()) 
							throw new FileNotFoundException();
				}
				catch(FileNotFoundException e)
				{
						display(e.toString(), "File not found ....");
				}
				catch(IOException e)
				{
						display(e.toString(),  "Approve option was not selected");
				}
      }
      
      
		void display(String msg, String s)
		{
				JOptionPane.showMessageDialog(null, msg, s, JOptionPane.ERROR_MESSAGE);
		}
      
		void backupFile() throws FileNotFoundException
      {
            DataInputStream in = null;
            DataOutputStream out = null;
            try
            {
               in = new DataInputStream(new FileInputStream(f));
               out = new DataOutputStream(new FileOutputStream(f2));
      
               try
               {
                  while (true)
                  {
                     byte data = in.readByte();
                     out.writeByte(data);
                  }      
               }

               catch(EOFException e)
               {
                  JOptionPane.showMessageDialog(null, "Success!!!",
                             "Backup Complete!", JOptionPane.INFORMATION_MESSAGE);
               }
               catch (IOException e)
               {
                  JOptionPane.showMessageDialog(null, "File Not Found ",
                             "Error", JOptionPane.INFORMATION_MESSAGE);
               }
            }
         finally
         {
            try
            {
                in.close();
                out.close();
            }

            catch(Exception e)
            {
                display(e.toString(), "Error");
            }
        }
    
      }
      
      boolean exists()
      {
          return f.exists();
      }

      public String toString()
      {
          return f.getName() +"\n" +f.getAbsolutePath() +"\n" +f.length() +" bytes";
      }

      public String wordCount()
      {
         try
         {
            int wordCount = 0,
                numberCount = 0,
                lineCount = 1,
                characterCount = 0,
                totalWords = 0;

            String c = " "; 

            FileReader r = new FileReader(f);
            StreamTokenizer t = new StreamTokenizer(r);

            t.resetSyntax();
            t.whitespaceChars(0, ' ');
            t.wordChars('a','z');
            t.wordChars('A','Z');
            t.wordChars('0','9');

            t.eolIsSignificant(true);

            while(t.nextToken() != StreamTokenizer.TT_EOF)
            {
               switch(t.ttype)
               {
                  case StreamTokenizer.TT_NUMBER:
                    numberCount++;
                    break;
                  case StreamTokenizer.TT_WORD:
                    characterCount += t.sval.length();
                    wordCount++;
                    break;
                  case StreamTokenizer.TT_EOL:
                    lineCount++;
                    break;
                  case StreamTokenizer.TT_EOF:
                    break;
                    default:

               }
            }

           r.close();

           totalWords = numberCount + wordCount;

           return f.getName() + " has " +  lineCount + " line(s), " + totalWords + 
                   " word(s), " + characterCount  + " characters. ";
           }

           catch(IOException e)
           {
               display(e.toString(), "Error");
           }

           return " ";

      }
      
      public String lineSearch(String input) throws Exception 
      {
        LineNumberReader lnr = new LineNumberReader(new FileReader(f));
        String line = null;
        String msg = "";
        // read lines 
        while ((line = lnr.readLine()) != null) {
            if (line.toUpperCase().contains(input.toUpperCase())) {
                msg += lnr.getLineNumber() + ": " + line + "\n";
            }
        }
        return msg;
      }
		
}