aufgabe2.java

/*
    Aufgabe 2) Eindimensionale Arrays und File I/O
*/

import java.awt.*;
import java.util.Arrays;

public class Aufgabe2 {

    private static String[] readFileData(String fileName, int lineStart, int lineEnd) {
        In fileReader = new In(fileName);
        String[] chosenlines = new String[lineEnd-lineStart];
        if (fileReader.exists()){
            String zeile;
            int counter = 0;
            while(fileReader.hasNextLine()){
                counter++;
                zeile = fileReader.readLine();
                if(counter >= lineStart && counter < lineEnd){
                    chosenlines[counter-lineStart] = zeile;
                }

            }
        }
        return chosenlines;
    }

    private static void extractData(String[] dataArray, int[] resultArray, int numColumn, int entriesPerYear) {
        int peryear = 0;
        for (int i = 0; i < dataArray.length; i++) {
            peryear  += Integer.parseInt(dataArray[i].split(";")[numColumn]);
            if ((i + 1) % entriesPerYear == 0) {
                resultArray[i/12] = peryear ;
                peryear = 0;
            }

        }
    }


    private static void drawChart(int[] frostDays, int[] iceDays, int[] summerDays, int[] heatDays) {
        int width = 1230;
        int height = 500;
        StdDraw.setCanvasSize(width, height);
        StdDraw.setXscale(0, width);
        StdDraw.setYscale(-height / 2, height / 2);
        StdDraw.setPenRadius(0.0055);
        Font font1 = new Font("Times", Font.PLAIN, 10);
        StdDraw.setFont(font1);

        int count = 0;
        for (int i = 79; i < 100 ; i++, count++) {

            StdDraw.text(30 + count*30,-230, Integer.toString(i));
        }
        for (int i = 0; i < 19 ; i++, count++) {

            if (i < 10) {
                StdDraw.text((30 + count*30),-230, "0" +  Integer.toString(i));
            } else {
                StdDraw.text(30 + count * 30, -230, Integer.toString(i));
            }
        }
        for (int i = 1; i <= 4; i++) {

            StdDraw.text(8, 50*i, Integer.toString(25*i));
        }
        for (int i = 1; i <= 4; i++) {

            StdDraw.text(1222, 50*i, Integer.toString(25*i));
        }
        for (int i = 1; i <= 4; i++) {

            StdDraw.text(1222, 50*i, Integer.toString(25*i));
        }
        for (int i = 1; i <= 4; i++) {

            StdDraw.text(1222, 50*i, Integer.toString(25*i));
        }


        for (int i = 0; i < frostDays.length ; i++) {
            StdDraw.setPenColor(Color.RED);
            StdDraw.rectangle(30 + i*30, summerDays[i],10,summerDays[i]);
            StdDraw.filledRectangle(30 + i*30,heatDays[i],5,heatDays[i]);
            StdDraw.setPenColor(Color.BLUE);
            StdDraw.rectangle(30 + 30*i,-(frostDays[i]),10,frostDays[i]);
            StdDraw.filledRectangle(30 + i*30,-(iceDays[i]),5,iceDays[i]);
        }

        StdDraw.setPenColor(Color.GREEN);
        StdDraw.setPenRadius(0.005);
        StdDraw.line(5,0, 1225, 0);

    }

    public static void main(String[] args) {
        String[] data = readFileData("weather_data.csv",290,770);
        int[] frostDays = new int[40];
        int[] iceDays= new int[40];
        int[] summerDays = new int [40];
        int [] heatDays = new int[40];
        extractData(data,frostDays,9,12);
        extractData(data,iceDays,10,12);
        extractData(data,summerDays,11,12);
        extractData(data,heatDays,12,12);
        drawChart(frostDays,iceDays,summerDays,heatDays);




    }
}