DouKaku?

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Sample170 {
    private static final String encoding = "MS932";
    private static final String FILE_NAME = "record.dat";
    
    public static void main(String[] args) {
        try {
            createTestData(FILE_NAME);

            List<Record> records = readData(FILE_NAME);
            System.out.println(records.size());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static List<Record> readData(String fileName) throws IOException {
        Reader reader = null;
        try {
            reader = new BufferedReader(new InputStreamReader(new FileInputStream(fileName), encoding));
            List<Record> result = new ArrayList<Record>();
            char[] smallBuf = new char[12];
            char[] menuBuf = new char[500];
            while (true) {
                Record record = new Record();
                if (reader.read(smallBuf) < 0) break;
                record.familyName = String.valueOf(smallBuf).trim();
                if (reader.read(smallBuf) < 0) break;
                record.firstName = String.valueOf(smallBuf).trim();
                if (reader.read(smallBuf, 0 , 1) < 0) break;
                record.sex = Record.Sex.valueOf(String.valueOf(smallBuf[0]));
                if (reader.read(smallBuf, 0 , 3) < 0) break;
                record.age = Integer.parseInt(String.valueOf(smallBuf, 0, 3).trim());
                
                if (reader.read(smallBuf, 0 , 4) < 0) break;
                int year = Integer.parseInt(String.valueOf(smallBuf, 0, 4).trim());
                if (reader.read(smallBuf, 0 , 2) < 0) break;
                int month = Integer.parseInt(String.valueOf(smallBuf, 0, 2).trim());
                for (int index = 1; index <= 31; index++) {
                    MenuData menu = new MenuData();
                    menu.year = year;
                    menu.month = month;
                    
                    if (reader.read(smallBuf, 0 , 2) < 0) break;
                    menu.day = Integer.parseInt(String.valueOf(smallBuf, 0, 2).trim());
                    if (reader.read(menuBuf) < 0) break;
                    menu.breakfast = String.valueOf(menuBuf).trim();
                    if (reader.read(menuBuf) < 0) break;
                    menu.lunch = String.valueOf(menuBuf).trim();
                    if (reader.read(menuBuf) < 0) break;
                    menu.dinner = String.valueOf(menuBuf).trim();
                }
                result.add(record);
            }
            return result;
        } finally {
            if (reader != null) {
                reader.close();
            }
        }
    }

    private static void createTestData(String fileName) throws IOException {
        Writer writer = null;
        try {
            writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName), encoding));
            Random random = new Random();
            Record.Sex[] sexValues = Record.Sex.values();
            for (int index = 0; index < 500; index++) {
                writer.write(String.format("%-12s", "FamilyName"));
                writer.write(String.format("%-12s", "FirstName"));
                writer.write(sexValues[random.nextInt(sexValues.length)].toString());
                writer.write(String.format("%3d", random.nextInt(120)));
                writer.write("2008");
                writer.write("03");
                for (int day = 1; day <= 31; day++) {
                    writer.write(String.format("%02d", day));
                    writer.write(String.format("%-500s", "breakfast menu."));
                    writer.write(String.format("%-500s", "lunch menu."));
                    writer.write(String.format("%-500s", "dinner menu."));
                }
            }

        } finally {
            if (writer != null) {
                writer.close();
            }
        }
    }
}

class Record {
    public enum Sex {
        F, M, U,
    }
    public String familyName;
    public String firstName;
    public Sex sex;
    public int age;
    public final List<MenuData> menuList = new ArrayList<MenuData>();
}

class MenuData {
    public int year;
    public int month;
    public int day;
    public String breakfast;
    public String lunch;
    public String dinner;
}