AllMetanitLessons/Collections/LearningProgs/ListsProg.java - master - GermanezZ/JavaExercises

AllMetanitLessons/Collections/LearningProgs/ListsProg.java

66 строк2 KB

germa

Уроки по Metanit

04 дек 2024, 20:39

04 дек 2024, 20:3948d575a

package AllMetanitLessons.Collections.LearningProgs;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;

public class ListsProg {

    public static void main (String[] args)  {

        try(FileInputStream fin = new FileInputStream("D://Files//data.csv")){

            byte[] data = new byte[fin.available()];

            fin.read(data);

            ArrayList<String[]> wordsInLine = new ArrayList<>();

            String text = new String(data);


            String[] lines = text.split("\n");   // разбитие на строки при встрече этого символа

            for (String line : lines){

                String [] word = line.split(",");

                wordsInLine.add(word);

            }
            HashMap<String, Integer> map = new HashMap<>();

            for (String[] words : wordsInLine) {
                /*if (words[6].equals("1990")) {


                    for (String word : words) {
                        System.out.print(word);
                        System.out.print("|");
                    }
                    System.out.print("\n-----------------------------------------------------\n");
                }*/     // вывод домов по параметру
                if (map.containsKey(words[6])){
                    Integer valueOfHauses = map.get(words[6]);
                    valueOfHauses++;
                    map.put(words[6], valueOfHauses);
                }else {
                    map.put(words[6],1);
                }

            }
           // System.out.println(map.get("1990"));

            for (String key : map.keySet()){
                System.out.println("Год "+ key + " Количество: " + map.get(key));
            }


        }catch(IOException exc){
            System.out.println(exc.getMessage());
        }

    }

}