Java-DSA/_150hasPath.java at main · AyanJaved/Java-DSA · GitHub

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import java.util.*;
public class _150hasPath {
    static class Edge{
        int src;
        int dest;
        int wt;
        public Edge(int s, int d,int w){
            this.src=s;
            this.dest=d;
            this.wt=w;
        }
    }
    static void createGraph(ArrayList<Edge> graph[]){
        for(int i=0;i<graph.length;i++){
            graph[i]=new ArrayList<>();
        }
        graph[0].add(new Edge(0,1,1));
        graph[0].add(new Edge(0,2,1));

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

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

        graph[3].add(new Edge(3,1,1));
        graph[3].add(new Edge(3,4,1));
        graph[3].add(new Edge(3,5,1));

        graph[4].add(new Edge(4,2,1));
        graph[4].add(new Edge(4,3,1));
        graph[4].add(new Edge(4,5,1));

        graph[5].add(new Edge(5,3,1));
        graph[5].add(new Edge(5,4,1));
        graph[5].add(new Edge(5,6,1));

        graph[6].add(new Edge(6,5,1));

    }
    public static boolean hasPath(ArrayList<Edge>[] graph,int src,int dest, boolean vis[]){
        if(src==dest){
            return true;
        }
        vis[src]=true;
        for(int i=0;i<graph[src].size();i++){
            Edge e = graph[src].get(i);
            if(!vis[e.dest] && hasPath(graph, e.dest ,dest,vis)){
                return true;
            }
        }
        return false;
    }
    public static void main(String[] args) {
        int V=7;
        @SuppressWarnings("unchecked")
        ArrayList<Edge> graph[] = new ArrayList[V];
        createGraph(graph);
        //dfs(graph,0,new boolean[V]);
        System.out.println(hasPath(graph,0,5,new boolean[V]));
    }
}