it-convos/Dijkstra_vs/yeet.java

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import javax.swing.*;
import java.awt.*;
import java.lang.Math;
import java.util.Random;
import java.util.*;

public class yeet extends JFrame {
    Scanner scan;
    int n, e; // n: Anzahl Punkte, e: Anzahl Wege
    String tmpStr1, filename;
    int[] xarr, yarr;
    int[][] earr;
    char tmpChar;
    int[] dist; // distanzen
    int[][] con; // connections

    public static void main(String[] args) {
        if (args.length == 0) {
            new yeet();
        } else {
            for (int i = 0; i < args.length; i++) {
                new yeet(args[i]);
            }
        }
    }

    public yeet() {
        setSize(800, 800);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setVisible(true);
        setBackground(new Color(0, 0, 0));
        filename = "input.txt";
        steps();
    }

    public yeet(String input) {
        setSize(800, 800);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setVisible(true);
        setBackground(new Color(0, 0, 0));
        filename = input;
        steps();
    }

    public void steps() {
        readFile(); // einlesen
        readNE(); // anzahl von n und e finden. Als int n und e gespeichert
        make(); // Arrays erstellen
        repaint();
    }

    public void readFile() {
        try {
            scan = new Scanner(new File(filename));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

    }

    public void readNE() {
        n = 0;
        e = 0;
        while (scan.hasNext() == true) {
            tmpChar = scan.next().charAt(0);
            if (tmpChar == 'n') {
                n++;
            }
            if (tmpChar == 'e') {
                e++;
            }
        }
        readFile();
    }

    public void make() {
        readFile();
        xarr = new int[n]; // X Position
        yarr = new int[n]; // Y Position
        earr = new int[e][3]; // [x][y]; x:Wert, y:0=Start, 1=Ziel, 2=Abstand

        for (int i = 0; i < n; i++) {
            scan.next();
            xarr[i] = scan.nextInt();
            yarr[i] = scan.nextInt();
        }
        for (int i = 0; i < e; i++) {
            scan.next();
            earr[i][0] = scan.nextInt();// Start
            earr[i][1] = scan.nextInt();// Ziel
            earr[i][2] = scan.nextInt();// Entfernung
        }
        readFile();
    }

    public int[] qwerty(int node) {
        dist = new int[n]; // kurzeste Distanz von 0 zu Punkt i
        int boi = 0;
        for (int r = 0; r < n; r++) {
            if (conn(node, r)) {
                boi++;
            }
        }
        int[] out;
        out = new int[boi];
        int boii = 0;
        for (int r = 0; r < n; r++) {
            if (conn(node, r)) {
                out[boii] = r;
            }
        }

        return out;
    }

    public boolean conn(int input, int input2) {
        boolean fish = false;
        for (int i = 0; i < n; i++) {
            if (earr[i][0] == input && earr[i][1] == input2) {
                fish = true;
            }
            if (earr[i][0] == input2 && earr[i][1] == input) {
                fish = true;
            }

        }
        return fish;
    }

    public int distance(int input, int input2) {
        for (int i = 0; i < n; i++) {
            if (earr[i][0] == input && earr[i][1] == input2) {
                return earr[i][2];
            }
            if (earr[i][0] == input2 && earr[i][1] == input) {
                return earr[i][2];
            }
        }
        return 0;
    }

    public void paint(Graphics g) {
        labAnzeigen(g);
    }

    public void labAnzeigen(Graphics g) {
        g.clearRect(0, 0, 800, 800); // Feld clearen
        g.setColor(new Color(200, 10, 100)); // Farbe setzen
        for (int i = 0; i < n; i++) {
            g.fillOval(xarr[i], yarr[i], 36, 36); // Punkt fur Stadt erstellen
            g.setColor(new Color(0, 0, 0));
            g.drawString(Integer.toString(i), xarr[i] + 14, yarr[i] + 22); // Stadt bezeichnen
            g.setColor(new Color(200, 10, 100));
        }
        for (int i = 0; i < e; i++) {
            g.drawLine(xarr[earr[i][0]] + 16, yarr[earr[i][0]] + 16, xarr[earr[i][1]] + 16, yarr[earr[i][1]] + 16); // linie
        }
        for (int i = 0; i < e; i++) {
            g.setColor(new Color(100, 255, 100));
            g.drawString(Integer.toString(earr[i][2]), (xarr[earr[i][0]] + xarr[earr[i][1]]) / 2 + 10,
                    (yarr[earr[i][0]] + yarr[earr[i][1]]) / 2 + 20); // zeichnung der Linie
            g.setColor(new Color(200, 10, 100));
        }
    }
}