/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package IO;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
    
/**
 * 
 * @author dannocz
 */
public class InputReader {
    
    public static Input readFile(String filename){
        try {
              
              /*  Sets up a file reader to read the file passed on the command
          77        line one character at a time */
              FileReader input = new FileReader(filename);
              
              /* Filter FileReader through a Buffered read to read a line at a
                 time */
              BufferedReader bufRead = new BufferedReader(input);
              
              String line;    // String that holds current file line
              int count = 0;  // Line number of count 
              ArrayList<String> cases= new ArrayList<String>();
              
              // Read first line
              line = bufRead.readLine();
              int noTestCases=Integer.parseInt(line);
              count++;
              
              // Read through file one line at time. Print line # and line
              while (count<=noTestCases){
                  //System.out.println("Reading. "+count+": "+line);
                  line = bufRead.readLine();
                  cases.add(line);
                  count++;
              }
              
              bufRead.close();
              
              return new Input(noTestCases,cases);
              
          }catch (ArrayIndexOutOfBoundsException e){
              /* If no file was passed on the command line, this expception is
              generated. A message indicating how to the class should be
              called is displayed */
              e.printStackTrace();        
  
          }catch (IOException e){
              // If another exception is generated, print a stack trace
              e.printStackTrace();
          }
        
        return null;
          
      }// end main
    }

import com.sun.xml.internal.messaging.saaj.packaging.mime.util.LineInputStream;
import sun.tools.tree.ReturnStatement;

import javax.swing.*;
import java.io.*;
import java.util.ArrayList;

/**
 * Date: 14/4/12
 * Time: 9:19 AM
 */
public class GoogleFileStream {
    public static ArrayList<String> getInput() throws IOException {
        JFileChooser fc = new JFileChooser();
        fc.showOpenDialog(null);
        File f = fc.getSelectedFile();

        ArrayList<String> ret = new ArrayList<String>();
        LineInputStream lis = new LineInputStream(new FileInputStream(f));
        String line;
        while( (line = lis.readLine()) != null )
        {
            ret.add(line);
        }

        // number of lines:
        ret.remove(0);

        return ret;
    }

    public static void setOutput(ArrayList<String> ret) throws IOException {

        JFileChooser fc = new JFileChooser();
        fc.showSaveDialog(null);
        File f = fc.getSelectedFile();

        StringBuilder sb = new StringBuilder();
        FileWriter fw = new FileWriter(f);
        for( int i = 0; i < ret.size(); i++ )
        {
            sb.delete(0, sb.length());
            sb.append(String.format( "Case #%d: ", i + 1));
            sb.append( ret.get(i) );
            sb.append( "\n" );

            String o = sb.toString();
            fw.write( o );
            System.out.print(o);
        }
        fw.close();
    }
}
