Graph.java

import java.util.ArrayList;

public class Graph {
    static class Edge{
        int src;
        int dest;
        int weight;

        public Edge(int s, int d, int w){
            this.src = s;
            this.dest = d;
            this.weight = w;
        }

    }

    public static void creategraph(ArrayList<Edge> graph[]){
       for(int i= 0; i<graph.length; i++){
        graph[i] = new ArrayList<Edge>();
       }

       graph[0].add(new Edge(0,2, 2));

       graph[1].add(new Edge(1,2, 10));
       graph[1].add(new Edge(1,3, 0));

       graph[2].add(new Edge(2,0, 2));
       graph[2].add(new Edge(2,1, 10));
       graph[2].add(new Edge(2,3, -1));

       graph[3].add(new Edge(3,1, 0));
       graph[3].add(new Edge(3,2, -1));
    }
    public static void main(String args[]){
       int V = 4;

       ArrayList<Edge> graph[] = new ArrayList[V];

       creategraph(graph);

       for(int i =0; i<graph[2].size();i++){
        Edge e = graph[2].get(i);
        System.out.println(e.dest + " "+ e.weight);
       }
    }
}