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In this example, we will implement a graph data structure using Java.
class Graph { //Inner class class Edge { int src, dest; } //Number of vertices and edges int vertices, edges; //Array to store all edges Edge[] edge; Graph(int vertices, int edges) { this.vertices = vertices; this.edges = edges; //Initialize the edge array edge = new Edge[edges]; for(int i = 0; i < edges; i++) { //each element of the edge array //is an object of Edge type edge[i] = new Edge(); } } public static void main(String[] args) { //Create an object of the Graph class int noVertices = 5; int noEdges = 8; Graph g = new Graph(noVertices, noEdges); //Create Graph g.edge[0].src = 1; // edge 1---2 g.edge[0].dest = 2; g.edge[1].src = 1; // edge 1---3 g.edge[1].dest = 3; g.edge[2].src = 1; // edge 1---4 g.edge[2].dest = 4; g.edge[3].src = 2; // edge 2---4 g.edge[3].dest = 4; g.edge[4].src = 2; // edge 2---5 g.edge[4].dest = 5; g.edge[5].src = 3; // edge 3---4 g.edge[5].dest = 4; g.edge[6].src = 3; // edge 3---5 g.edge[6].dest = 5; g.edge[7].src = 4; // edge 4---5 g.edge[7].dest = 5; //Print Chart for(int i = 0; i < noEdges;++) { System.out.println(g.edge[i].src + " - " + g.edge[i].dest); } } }
Output Result
1 - 2 1 - 3 1 - 4 2 - 4 2 - 5 3 - 4 3 - 5 4 - 5
In the above example, we have implemented a graphical data structure using Java.