package dancinggooglers;

import java.io.File;
import java.util.Scanner;

public class DanceScoreCalculator {


    public static void main(String[] args) {
        if(args.length <= 0 || args[0] == null) {
            System.out.println("You must enter a file to read");
            System.out.println("Usage: blah <filename>");
            System.exit(0);
        }

        File argFile = new File(args[0]);
        try {
            Scanner googleSpeakScanner = new Scanner(argFile);
            String firstLine = googleSpeakScanner.nextLine();
            Integer linesToScan = new Integer(firstLine);
            for(int i = 1; i <= linesToScan; i++) {
                String googleDancerLine = googleSpeakScanner.nextLine();
                DanceScoreCase danceCase = new DanceScoreCase(googleDancerLine);
                System.out.println(String.format("Case #%d: %d", i, danceCase.maxDancersThatCouldPass()));
            }
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}

package codejam.common;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author chenling
 */
public class FileUtil {

    public static List<String> readLines(String fileName) {
        List<String> result = new ArrayList<String>();
        FileReader in = null;
        try {
            in = new FileReader(fileName);
            BufferedReader reader = new BufferedReader(in);
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (line.trim().length() > 0) {
                    result.add(line);
                }
            }
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                Logger.getLogger(FileUtil.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return result;
    }

    public static void writeLines(String fileName, List<String> lines) {
        FileWriter writer = null;
        try {
            writer = new FileWriter(fileName);
            PrintWriter printWriter = new PrintWriter(writer);
            for (String line : lines) {
                printWriter.println(line);
            }
        } catch (IOException ex) {
            Logger.getLogger(FileUtil.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (IOException ex) {
                    Logger.getLogger(FileUtil.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
}
