import java.util.Arrays;
public class DijkstraAlgorithm {
static final int INF = Integer.MAX_VALUE;
public static void dijkstra(int[][] graph, int start) { int V = graph.length;
int[] dist = new int[V];
boolean[] visited = new boolean[V];
Arrays.fill(dist, INF);
dist[start] = 0;
for (int count = 0; count < V - 1; count++) { int u = minDistance(dist, visited);
visited[u] = true;
for (int v = 0; v < V; v++) { if (!visited[v] && graph[u][v] != 0 && dist[u] != INF && dist[u] + graph[u][v] < dist[v]) { dist[v] = dist[u] + graph[u][v];
}
}
}
printSolution(dist);
}
static int minDistance(int[] dist, boolean[] visited) { int min = INF, minIndex = -1;
for (int v = 0; v < dist.length; v++) { if (!visited[v] && dist[v] <= min) { min = dist[v];
minIndex = v;
}
}
return minIndex;
}
static void printSolution(int[] dist) { System.out.println("Distancias mínimas desde el vértice inicial:"); for (int i = 0; i < dist.length; i++) { System.out.println("Vértice " + i + ": " + dist[i]); }
}
public static void main(String[] args) { int[][] graph = { {0, 4, 0, 0, 0, 0, 0, 8, 0}, {4, 0, 8, 0, 0, 0, 0, 11, 0}, {0, 8, 0, 7, 0, 4, 0, 0, 2}, {0, 0, 7, 0, 9, 14, 0, 0, 0}, {0, 0, 0, 9, 0, 10, 0, 0, 0}, {0, 0, 4, 14, 10, 0, 2, 0, 0}, {0, 0, 0, 0, 0, 2, 0, 1, 6}, {8, 11, 0, 0, 0, 0, 1, 0, 7}, {0, 0, 2, 0, 0, 0, 6, 7, 0} };
dijkstra(graph, 0);
}
}