[АПС] Лаб 9: Вовед во графови Креирање на граф

import java.util.Scanner;

public class GraphCreate {


    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt();
        scan.next();
        int nodes = scan.nextInt();
        Graph graph = new Graph(nodes);

        for (int i=0; i<n; ++i) {
            String line = scan.nextLine();
            String parts[] = line.split(" ");

            switch(parts[0]) {

            case "ADDEDGE": graph.addEdge(Integer.parseInt(parts[1]), Integer.parseInt(parts[2]));
                break;
            case "DELETEEDGE": graph.deleteEdge(Integer.parseInt(parts[1]), Integer.parseInt(parts[2]));
                break;
            case "ADJACENT": System.out.println(graph.adjacent(Integer.parseInt(parts[1]), Integer.parseInt(parts[2])));
                break;
            case "PRINTMATRIX": graph.printMatrix();
                break;
            case "PRINTNODE": System.out.println(graph.get_node_value(Integer.parseInt(parts[1])));
            }
        }
    }
}

class Graph {

    int num_nodes; // broj na jazli
    Character nodes[];    // informacija vo jazlite - moze i ne mora?
    int adjMat[][];  // matrica na sosednost


    @SuppressWarnings("unchecked")
    public Graph(int num_nodes) {
        this.num_nodes = num_nodes;
        nodes = new Character[num_nodes];
        for (int i=0; i< num_nodes; ++i)
            nodes[i] = (char)(i + 'A');
        adjMat = new int[num_nodes][num_nodes];

        for(int i=0;i<this.num_nodes;i++)
            for(int j=0;j<this.num_nodes;j++)
                adjMat[i][j]=0;
    }


    int adjacent(int x,int y)
    {  // proveruva dali ima vrska od jazelot so indeks x do jazelot so indeks y
       return (adjMat[x][y]!=0)?1:0;
    }

    void addEdge(int x,int y)
    {  // dodava vrska megu jazlite so indeksi x i y
       adjMat[x][y]=1;
       adjMat[y][x]=1;
    }


    void deleteEdge(int x,int y)
    {
       // ja brise vrskata megu jazlite so indeksi x i y
       adjMat[x][y]=0;
       adjMat[y][x]=0;
    }

    // Moze i ne mora?
    Character get_node_value(int x)
    {  // ja vraka informacijata vo jazelot so indeks x
          return nodes[x];
    }

    // Moze i ne mora?
    void set_node_value(int x, Character a)
    {  // ja postavuva informacijata vo jazelot so indeks na a
       nodes[x]=a;
    }


    public int getNum_nodes() {
        return num_nodes;
    }

    public void setNum_nodes(int num_nodes) {
        this.num_nodes = num_nodes;
    }


    void printMatrix() {
        for (int i=0; i < adjMat.length; ++i) {
            for (int j=0; j < adjMat[0].length; ++j)
                System.out.print(adjMat[i][j] + " ");
            System.out.println();
        }
    }
}