technologie internetowe w javie 1

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package superfastconcat;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.UUID;

/**
 *
 * @author Desdemona
 */
public class SuperFastConcat {
    private String filename = "gen.txt";
    private List<String> GiantData = new ArrayList();
    private List<String> done = new ArrayList();
    void dzialaj()
    {

        BufferedReader br;
        try {
            br = new BufferedReader(new FileReader(filename));
            String line;
            while ((line = br.readLine()) != null) {
                String[] splited = line.split("\\s+");
                GiantData.add(splited[0]);
                GiantData.add(splited[1]);
            }
            br.close();
        } catch (Exception ex) {
            Logger.getLogger(SuperFastConcat.class.getName()).log(Level.SEVERE, null, ex);
        }

        int marian = 8;
        long startTime = System.nanoTime();
        for(int j=0; j<GiantData.size(); j+=2)
        {
            String c = "";
            for(int i=0; i<GiantData.get(j).length(); i++)
            { c = c + GiantData.get(j).charAt(i);}
            for(int i=0;i<GiantData.get(j+1).length();i++)
            {c = c + GiantData.get(j+1).charAt(i);}
            done.add(c);
            marian = -~(marian%7);
            //return c;
        }
        long endTime = System.nanoTime();
        //System.out.println("Time passed: " + (System.nanoTime() - startTime) / 1000000);
        System.out.println("Czas sklejania: " + (endTime - startTime) / 1000000000);
        System.out.println(marian);
        System.out.println(done.size());
    }

    void narzut_petli()
    {
        int marian = 8;
        done.clear();
        long startTime = System.nanoTime();

        for(int i=0; i<100000; i++)
        {
            String c = UUID.randomUUID().toString();
            done.add(c);
            marian = -~(marian%7);
        }
        long endTime = System.nanoTime();
        System.out.println(marian);
        System.out.println(done.size());
        System.out.println("Narzut pętli: " + (endTime - startTime) / 1000000000);
    }
}