10 DFS

Last Updated: 2 years ago2023-01-25

Just the graph building + outgoing nodes part

import java.util.ArrayList;

class Graph
{
    int size;
    ArrayList adj[];

    Graph(int size)
    {
        this.size = size;

        adj = new ArrayList[size];

        for(int i = 0; i<size; i++)
        {
            adj[i] = new ArrayList<Integer>();
        }
    }

    void insert(int u, int v)
    {
        int ul = u-65;
        int vl = v-65;
        adj[ul].add(vl);
    }

    void outgoing(char from)
    {
        System.out.println("Nodes outgoing from " + from);

        int u = (char)(from) - 65;
        for(int i=0; i<adj[u].size(); i++)
        {
            int v = (int) adj[u].get(i);
            char ch = (char) (v + 65);
            System.out.println(ch);
        }
    }
}

class p06
{
    public static void main(String[] args)
    {
        Graph graph = new Graph(8);

        graph.insert('A', 'B');
        graph.insert('A', 'E');
        graph.insert('B', 'C');
        graph.insert('D', 'E');
        graph.insert('A', 'D');

        graph.outgoing('A');
    }
}

Output

Nodes outgoing from A
B
E
D

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