import java.io.*;
import java.util.Collections;
import java.util.Scanner;

public class CSV1 {
	public void csv(){

		int symbol;
		char ch;
		Scanner scanner = null;
		String data;
		byte index = 0;
		StringBuilder stringBuilder = new StringBuilder();
		String folderCSV = "D:\\test\\test.csv";

		InputStreamReader reader = null;
		try {
			reader = new InputStreamReader(new FileInputStream(folderCSV), "cp1251");

			symbol = reader.read();
			while (symbol != -1) {
				ch = (char) symbol;
				if (ch != '\n' ) {
					stringBuilder.append(ch);
				}else if(ch == '\r'){

				}else {
					scanner = new Scanner(stringBuilder.toString());
					scanner.useDelimiter(";");
					User user = new User();
					while (scanner.hasNext()) {
						data = scanner.next();
						if (index == 0) {
							user.setLastName(data);
						} else if (index == 1) {
							user.setName(data);
						} else if (index == 2) {
							user.setYear(Integer.parseInt(data));
						} else {
							System.out.println("Error field");
						}
						index++;
					}
					index = 0;
					stringBuilder.setLength(0);
					users.add(user);
				}
				symbol = reader.read();
			}

		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}


		Collections.sort(users, (o1, o2) -> o2.getYear() - o1.getYear());

		OutputStream outputStream = new FileOutputStream(folderCSV);
		stringBuilder.setLength(0);

		for (User user : users) {
			stringBuilder.append(user.getLastName()).append(";");
			stringBuilder.append(user.getName()).append(";");
			stringBuilder.append(user.getYear()).append("\n");
		}

		try {
			outputStream.write(stringBuilder.toString().getBytes("Cp1251"));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}