package com.company;

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Scanner;

public class Main {
    public static final String FILE = "C:/Users/Jakub/Desktop/numeryczne/untitled1/src/com/company/test1.csv";

    public static void scanner() throws IOException{
        long start = System.nanoTime();
        Scanner scanner = new Scanner(Paths.get(FILE));
        int i = 0;
        while(scanner.hasNext()){
            scanner.nextLine();
            i++;
        }
        long stop = System.nanoTime();
        System.out.println("Scanner " + i + " Czas: " + (stop-start));
    }

    public static void bufferedreadlines() throws IOException{
        long start = System.nanoTime();
        int i = 0;
        try { BufferedReader bufferedReader = Files.newBufferedReader(Paths.get(FILE));
                String line = null;
            while ((line = bufferedReader.readLine()) != null) {
                i++;
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
        long stop = System.nanoTime();
        System.out.println("Scanner " + i + " Czas: " + (stop-start));
    }

    public static void bufferedlines() throws IOException{
        long start = System.nanoTime();
        int i = 0;
        try { BufferedReader bufferedReader = Files.newBufferedReader(Paths.get(FILE));
            i = (int) bufferedReader.lines().count();
        } catch(Exception e) {
            e.printStackTrace();
        }
        long stop = System.nanoTime();
        System.out.println("Scanner " + i + " Czas: " + (stop-start));
    }

    private static void inputStream() throws IOException {
        long start = System.nanoTime();
        InputStream is = new BufferedInputStream(new FileInputStream(FILE));
        int counter = 0;
        byte[] c = new byte[1024];
        int readChars = 0;
        while ( (readChars = is.read(c)) != -1 ) {
            for ( int i = 0; i < readChars; i++ ) {
                if ( c[i] == '\n' ) {
                    counter++;
                }
            }
        }
        long end = System.nanoTime();
        System.out.println("INPUT READER: " + counter + " czas: " + (end - start));
    }




    public static void main(String[] args) throws IOException {
        scanner();
        bufferedreadlines();
        bufferedlines();
        inputstream();
    }
}