public static void decreaseKey(MinHeap minHeap, double newKey, int vertex)
{
int index = minHeap.indexes[vertex];
HeapNode node = minHeap.mH[index];
node.key = newKey;
minHeap.bubbleUp(index);
}
public virtual void decreaseKey(MinHeap minHeap, double newKey, int vertex)
{
//get the index which key's needs a decrease;
int index = minHeap.indexes[vertex];
//get the node and update its value
HeapNode node = minHeap.mH[index];
node.key = newKey;
minHeap.bubbleUp(index);
}