2024-06-15 14:48:28 +00:00
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package graph;
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2024-07-03 17:41:46 +00:00
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import OurApplication.OurLogElement;
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import logging.LogElementList;
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2024-07-02 22:46:21 +00:00
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import visualizationElements.Edge;
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import visualizationElements.EdgeStyle;
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import visualizationElements.Vertex;
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2024-07-07 14:29:45 +00:00
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import java.awt.*;
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import java.util.HashMap;
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2024-06-15 14:48:28 +00:00
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import java.util.Objects;
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2024-07-07 14:29:45 +00:00
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import java.util.PriorityQueue;
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2024-06-15 14:48:28 +00:00
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import java.util.Vector;
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2024-07-07 21:07:56 +00:00
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/**
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* Represents an undirected graph with vertices marked by T and edges marked by U.
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* Inherits from the Graph class and provides additional functionality specific to undirected graphs.
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*
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* @param <T> Type of marking for vertices in the graph.
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* @param <U> Type of marking for edges in the graph.
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*/
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2024-06-15 19:55:30 +00:00
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public class UndirectedGraph<T extends VertexMarking, U extends EdgeMarking> extends Graph<T, U> {
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2024-07-02 22:46:21 +00:00
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// ATTRIBUTE
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private visualizationElements.Graph screenGraph;
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2024-07-03 17:41:46 +00:00
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private LogElementList<OurLogElement> logList;
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2024-07-02 22:46:21 +00:00
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2024-06-15 19:55:30 +00:00
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// KONSTRUKTOREN
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2024-06-15 14:48:28 +00:00
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2024-07-07 21:07:56 +00:00
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/**
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* Constructs an empty undirected graph with default properties.
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*/
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2024-06-15 14:48:28 +00:00
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public UndirectedGraph() {
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super();
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2024-07-02 22:46:21 +00:00
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this.screenGraph = new visualizationElements.Graph(new Vector<Vertex>(), new Vector<Edge>(), false, EdgeStyle.Direct);
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2024-07-03 17:41:46 +00:00
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this.logList = new LogElementList<>();
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2024-06-15 14:48:28 +00:00
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}
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2024-07-07 21:07:56 +00:00
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/**
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* Constructs an undirected graph with a specified name.
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*
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* @param s The name of the graph.
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*/
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2024-06-15 14:48:28 +00:00
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public UndirectedGraph(String s) {
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super(s);
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2024-07-02 22:46:21 +00:00
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this.screenGraph = new visualizationElements.Graph(new Vector<Vertex>(), new Vector<Edge>(), false, EdgeStyle.Direct);
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2024-07-03 17:41:46 +00:00
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this.logList = new LogElementList<>();
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2024-07-02 22:46:21 +00:00
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}
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// GET-ER
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2024-07-07 21:07:56 +00:00
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/**
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* Retrieves the visualization graph associated with this undirected graph.
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*
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* @return The visualization graph.
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*/
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2024-07-02 22:46:21 +00:00
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public visualizationElements.Graph getScreenGraph() {
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return this.screenGraph;
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}
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2024-07-07 21:07:56 +00:00
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/**
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* Retrieves the log list containing logging elements related to operations on this graph.
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*
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* @return The log element list.
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*/
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2024-07-03 17:41:46 +00:00
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public LogElementList<OurLogElement> getLogList() {
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return this.logList;
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}
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2024-07-07 21:07:56 +00:00
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/**
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* Creates and retrieves a deep copy of the visualization graph associated with this undirected graph.
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*
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* @return A deep copy of the visualization graph.
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*/
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public visualizationElements.Graph getScreenGraphCopy() {
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visualizationElements.Graph graphCopy = new visualizationElements.Graph(new Vector<Vertex>(), new Vector<Edge>(), false, EdgeStyle.Direct);
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Vector<visualizationElements.Vertex> copiedVertexes = new Vector<>();
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Vector<visualizationElements.Edge> copiedEdges = new Vector<>();
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for (visualizationElements.Vertex vertexCopy : this.screenGraph.getVertexes()) {
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visualizationElements.Vertex newCopiedVertex = new visualizationElements.Vertex(vertexCopy.getXpos(), vertexCopy.getYpos(), vertexCopy.getMarking(), vertexCopy.getColor());
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copiedVertexes.add(newCopiedVertex);
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graphCopy.setVertexes(copiedVertexes);
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}
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for (visualizationElements.Edge edgeCopy : this.screenGraph.getEdges()) {
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visualizationElements.Edge newCopiedEdge = new visualizationElements.Edge(edgeCopy.getSource(), edgeCopy.getDestination(), edgeCopy.getMarking(), edgeCopy.getColor());
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copiedEdges.add(newCopiedEdge);
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graphCopy.setEdges(copiedEdges);
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}
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return graphCopy;
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}
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2024-07-02 22:46:21 +00:00
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// HINZUFÜGEN
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2024-07-07 21:07:56 +00:00
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/**
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* Adds an edge to the undirected graph and updates the associated visualization graph.
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*
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* @param e The edge to be added.
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*/
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public void addEdge(MarkedEdge<U> e) {
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super.addEdge(e);
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this.screenGraph.getEdges().add(e.getScreenEdge());
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}
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2024-07-07 21:07:56 +00:00
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/**
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* Adds a vertex to the undirected graph and updates the associated visualization graph.
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*
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* @param n The vertex to be added.
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*/
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2024-07-02 22:46:21 +00:00
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public void addVertex(MarkedVertex<T> n) {
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super.addVertex(n);
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this.screenGraph.getVertexes().add(n.getScreenVertex());
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}
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// LÖSCHEN
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2024-07-07 21:07:56 +00:00
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/**
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* Removes an edge from the undirected graph and updates the associated visualization graph.
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*
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* @param e The edge to be removed.
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*/
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2024-07-02 22:46:21 +00:00
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public void removeEdge(MarkedEdge<U> e) {
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super.removeEdge(e);
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this.screenGraph.getEdges().remove(e.getScreenEdge());
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}
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2024-07-07 21:07:56 +00:00
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/**
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* Removes a vertex from the undirected graph and updates the associated visualization graph.
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*
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* @param n The vertex to be removed.
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*/
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public void removeVertex(MarkedVertex<T> n) {
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super.removeVertex(n);
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this.screenGraph.getVertexes().remove(n.getScreenVertex());
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2024-06-15 14:48:28 +00:00
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}
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2024-06-15 19:55:30 +00:00
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// KNOTEN EIGENSCHAFTEN
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2024-07-07 21:07:56 +00:00
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/**
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* Returns the degree of a specified vertex in the undirected graph.
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* The degree of a vertex is the number of edges incident to it.
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*
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* @param n The vertex for which to determine the degree.
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* @return The degree of the vertex.
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*/
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public int degree(MarkedVertex<T> n) {
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int degree = 0;
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2024-06-25 15:18:34 +00:00
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for (MarkedEdge<U> i: this.getAllEdges()) {
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if (i.getSource() == n) {
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degree += 1;
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}
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if (i.getDestination() == n) {
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degree += 1;
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}
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}
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return degree;
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}
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2024-07-07 21:07:56 +00:00
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/**
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* Returns the degree of a specified vertex by its name in the undirected graph.
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*
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* @param s The name of the vertex for which to determine the degree.
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* @return The degree of the vertex.
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* @throws NameDoesNotExistException If the vertex with the specified name does not exist in the graph.
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*/
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public int degree(String s) throws NameDoesNotExistException {
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for (MarkedVertex<T> i: this.getAllVertexes()) {
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if (Objects.equals(i.getName(), s)) {
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return degree(i);
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}
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}
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throw new NameDoesNotExistException("One of the Vertexes might not exist");
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}
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2024-07-07 21:07:56 +00:00
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/**
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* Returns a vector containing all neighbors (adjacent vertices) of a specified vertex in the undirected graph.
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*
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* @param n The vertex for which to retrieve neighbors.
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* @return A vector of neighboring vertices.
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*/
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public Vector<MarkedVertex<T>> getNeighbours(MarkedVertex<T> n) {
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Vector<MarkedVertex<T>> neighbours = new Vector<>();
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for (MarkedEdge<U> i: this.getAllEdges()) {
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if (i.getSource() == n && !neighbours.contains(i.getDestination())) {
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neighbours.add((MarkedVertex<T>) i.getDestination());
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} else if (i.getDestination() == n && !neighbours.contains(i.getSource())) {
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neighbours.add((MarkedVertex<T>) i.getSource());
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}
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}
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return neighbours;
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}
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2024-06-25 15:18:34 +00:00
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2024-07-03 17:41:46 +00:00
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2024-07-07 21:07:56 +00:00
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/**
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* Computes the shortest path between two vertices using Dijkstra's algorithm in the undirected graph.
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*
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* @param n1 The starting vertex of the shortest path.
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* @param n2 The ending vertex of the shortest path.
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* @return The length of the shortest path between n1 and n2.
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*/
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public int getShortestPathDijkstra(MarkedVertex<T> n1, MarkedVertex<T> n2) {
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2024-07-07 14:29:45 +00:00
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// Erstellt Hashmap um Distanz von Startnoten zu jedem Knoten auf dem Graph zu tracken
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// Erstellt Hashmap um zu tracken welche Knoten schon besucht wurden
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2024-07-07 18:34:38 +00:00
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// Erstelle Hashmap um Vorgängerknoten zu tracken
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2024-07-07 14:29:45 +00:00
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// Initialisierung aller Distanzen auf UNENDLICH (= -1)
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// Initialisierung, dass kein Knoten besucht wurde
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2024-07-07 18:34:38 +00:00
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// Initialisierung aller Vorgänger auf null
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2024-07-07 14:29:45 +00:00
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HashMap<MarkedVertex<T>, Integer> distance = new HashMap<>();
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HashMap<MarkedVertex<T>, Boolean> visited = new HashMap<>();
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2024-07-07 18:34:38 +00:00
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HashMap<MarkedVertex<T>, MarkedVertex<T>> predecessors = new HashMap<>();
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2024-07-07 14:29:45 +00:00
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for (MarkedVertex<T> i: this.getAllVertexes()) {
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distance.put(i, -1);
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visited.put(i, false);
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2024-07-07 18:34:38 +00:00
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predecessors.put(i, null);
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2024-07-07 14:29:45 +00:00
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}
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// Erstelle Schlange wo die nächsten Verbindungen drin sind
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PriorityQueue<WrapperElement<T>> queue = new PriorityQueue<>(new WrapperComparator<T>());
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// Distanz zu Startknoten auf 0
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// Weg zu Startknoten in die Schlange aufnehmen
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distance.put(n1, 0);
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queue.add(new WrapperElement<>(n1, 0));
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// Variable, die Distanz zwischen aktuellem Knoten und Nachfolger speichert
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int dist = 0;
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// Zähler für LogList
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int step = 0;
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// String für den Description Inhalt
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String textDescription;
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// Färben der Start und Ziel Knoten für Visualisierung + hinzufügen zur LogList
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n1.getScreenVertex().setColor(Color.RED);
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n2.getScreenVertex().setColor(Color.RED);
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textDescription = "Startknoten: " + n1.getScreenVertex().getMarking()
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+ ", Endknoten: " + n2.getScreenVertex().getMarking();
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this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
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while (!queue.isEmpty()) {
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// Den nächsten Knoten, der am wenigsten kostet, besuchen
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WrapperElement<T> nextVertex = queue.poll();
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2024-07-08 15:12:08 +00:00
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// Falls Knoten schon besucht
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if(!visited.get(nextVertex.getElement())){
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// Knoten als besucht makieren
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visited.put(nextVertex.getElement(), true);
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textDescription = "Visit " + nextVertex.getElement().getName();
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// Logging
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System.out.println(textDescription);
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2024-07-08 15:35:55 +00:00
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if (nextVertex.getElement().getScreenVertex().getColor() != Color.RED) {
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nextVertex.getElement().getScreenVertex().setColor(Color.BLUE);
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}
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2024-07-08 15:12:08 +00:00
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this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
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}
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2024-07-07 18:34:38 +00:00
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// Wenn Weg gefunden, brich ab
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if (nextVertex.getElement() == n2) {
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MarkedVertex<T> colorroute = n2;
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while (colorroute != null) {
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textDescription = colorroute.getName();
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System.out.println(textDescription);
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colorroute.getScreenVertex().setColor(Color.green);
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this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
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colorroute = predecessors.get(colorroute);
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}
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//zurücksetzten der Färbungen
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this.clearScreenGraphColor();
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return distance.get(n2);
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}
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2024-07-07 14:29:45 +00:00
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// Gehe von diesem Knoten aus alle erreichbaren Knoten durch
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for (MarkedVertex<T> i: this.getNeighbours(nextVertex.getElement())) {
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// Kante finde, die den jetzigen und nächsten Knoten verbindet
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for (MarkedEdge<U> j: this.getAllEdges()) {
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if (j.getSource() == nextVertex.getElement() && j.getDestination() == i) {
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// Berechne Distanz zu nächstem Knoten
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EdgeWeightMarking marking = (EdgeWeightMarking) j.getMarking();
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dist = distance.get(nextVertex.getElement()) + marking.getWeight();
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break;
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}
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}
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// Wenn es schon einen kürzeren Weg zum Knoten gibt, überspringen
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if ((distance.get(i) <= dist && distance.get(i) != -1) || visited.get(i)) {
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continue;
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}
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2024-07-07 19:13:34 +00:00
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// Vorgänger aktualisieren
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predecessors.put(i, nextVertex.getElement());
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2024-07-07 14:29:45 +00:00
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// Aktualisiere Distanz von Start zu nächstem Knoten
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distance.put(i, dist);
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// Logging
|
|
|
|
textDescription = "Add " + i.getName() + " with " + dist + " weight to queue.";
|
|
|
|
System.out.println(textDescription);
|
2024-07-07 21:39:17 +00:00
|
|
|
if (i.getScreenVertex().getColor() != Color.RED) {
|
|
|
|
i.getScreenVertex().setColor(Color.YELLOW);
|
|
|
|
}
|
2024-07-07 14:29:45 +00:00
|
|
|
this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
|
|
|
|
|
|
|
|
// Nehme nächsten Knoten in die Queue auf
|
|
|
|
queue.add(new WrapperElement<>(i, dist));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
//zurücksetzten der Färbungen
|
|
|
|
this.clearScreenGraphColor();
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|
|
|
|
2024-07-07 18:34:38 +00:00
|
|
|
MarkedVertex<T> colorroute = n2;
|
|
|
|
while (colorroute != null) {
|
|
|
|
textDescription = colorroute.getName();
|
|
|
|
System.out.println(textDescription);
|
|
|
|
colorroute.getScreenVertex().setColor(Color.green);
|
|
|
|
this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
|
|
|
|
|
|
|
|
colorroute = predecessors.get(colorroute);
|
|
|
|
}
|
|
|
|
|
2024-07-07 14:29:45 +00:00
|
|
|
System.out.println("Done");
|
|
|
|
// Gibt Distanz zu gefragtem Knoten zurück
|
|
|
|
return distance.get(n2);
|
2024-07-03 17:41:46 +00:00
|
|
|
}
|
2024-07-07 14:29:45 +00:00
|
|
|
|
|
|
|
|
2024-07-07 21:07:56 +00:00
|
|
|
/**
|
|
|
|
* Computes the shortest path between two vertices using A* algorithm in the undirected graph.
|
|
|
|
*
|
|
|
|
* @param n1 The starting vertex of the shortest path.
|
|
|
|
* @param n2 The ending vertex of the shortest path.
|
|
|
|
* @return The length of the shortest path between n1 and n2.
|
|
|
|
*/
|
2024-07-08 15:12:08 +00:00
|
|
|
public double getShortestPathAStar(MarkedVertex<T> n1, MarkedVertex<T> n2) {
|
2024-07-07 14:29:45 +00:00
|
|
|
|
|
|
|
// Erstellt Hashmap um Distanz von Startnoten zu jedem Knoten auf dem Graph zu tracken
|
|
|
|
// Erstellt Hashmap um zu tracken welche Knoten schon besucht wurden
|
2024-07-07 18:34:38 +00:00
|
|
|
// Erstelle Hashmap um Vorgängerknoten zu tracken
|
2024-07-07 14:29:45 +00:00
|
|
|
// Initialisierung aller Distanzen auf UNENDLICH (= -1)
|
|
|
|
// Initialisierung, dass kein Knoten besucht wurde
|
2024-07-07 18:34:38 +00:00
|
|
|
// Initialisierung aller Vorgänger auf null
|
2024-07-08 15:12:08 +00:00
|
|
|
HashMap<MarkedVertex<T>, Double> distance = new HashMap<>();
|
2024-07-07 14:29:45 +00:00
|
|
|
HashMap<MarkedVertex<T>, Boolean> visited = new HashMap<>();
|
2024-07-07 18:34:38 +00:00
|
|
|
HashMap<MarkedVertex<T>, MarkedVertex<T>> predecessors = new HashMap<>();
|
2024-07-07 14:29:45 +00:00
|
|
|
for (MarkedVertex<T> i: this.getAllVertexes()) {
|
2024-07-08 15:12:08 +00:00
|
|
|
distance.put(i, -1.0);
|
2024-07-07 14:29:45 +00:00
|
|
|
visited.put(i, false);
|
2024-07-07 18:34:38 +00:00
|
|
|
predecessors.put(i, null);
|
2024-07-07 14:29:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Erstelle Schlange wo die nächsten Verbindungen drin sind
|
|
|
|
PriorityQueue<WrapperElement<T>> queue = new PriorityQueue<>(new WrapperComparator<T>());
|
|
|
|
|
|
|
|
// Distanz zu Startknoten auf 0
|
|
|
|
// Weg zu Startknoten in die Schlange aufnehmen
|
2024-07-08 15:12:08 +00:00
|
|
|
distance.put(n1, 0.0);
|
2024-07-07 14:29:45 +00:00
|
|
|
queue.add(new WrapperElement<>(n1, 0));
|
|
|
|
|
|
|
|
// Variable, die Distanz zwischen aktuellem Knoten und Nachfolger speichert
|
2024-07-08 15:12:08 +00:00
|
|
|
double dist = 0;
|
2024-07-07 14:29:45 +00:00
|
|
|
// Variable, die Distanz zwischen dem potenziell nächsten Knoten und dem Zielknoten speichert
|
2024-07-08 15:12:08 +00:00
|
|
|
double airDist = 0;
|
2024-07-07 14:29:45 +00:00
|
|
|
// Variable, die Distanz zwischen dem aktuellen Knoten bis zum Endknoten speichert
|
2024-07-08 15:12:08 +00:00
|
|
|
double distToFinish = 0;
|
2024-07-07 14:29:45 +00:00
|
|
|
// Zähler für LogList
|
|
|
|
int step = 0;
|
|
|
|
// String für den Description Inhalt
|
|
|
|
String textDescription;
|
|
|
|
|
|
|
|
// Färben der Start und Ziel Knoten für Visualisierung + hinzufügen zur LogList
|
|
|
|
n1.getScreenVertex().setColor(Color.RED);
|
|
|
|
n2.getScreenVertex().setColor(Color.RED);
|
|
|
|
textDescription = "Startknoten: " + n1.getScreenVertex().getMarking()
|
|
|
|
+ ", Endknoten: " + n2.getScreenVertex().getMarking();
|
|
|
|
this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
|
|
|
|
|
|
|
|
while (!queue.isEmpty()) {
|
|
|
|
// Den nächsten Knoten, der am wenigsten kostet, besuchen
|
|
|
|
WrapperElement<T> nextVertex = queue.poll();
|
|
|
|
|
2024-07-08 15:12:08 +00:00
|
|
|
// Falls Knoten schon besucht
|
|
|
|
if(!visited.get(nextVertex.getElement())){
|
|
|
|
// Knoten als besucht makieren
|
|
|
|
visited.put(nextVertex.getElement(), true);
|
|
|
|
textDescription = "Visit " + nextVertex.getElement().getName();
|
|
|
|
// Logging
|
|
|
|
System.out.println(textDescription);
|
2024-07-08 15:35:55 +00:00
|
|
|
if (nextVertex.getElement().getScreenVertex().getColor() != Color.RED) {
|
|
|
|
nextVertex.getElement().getScreenVertex().setColor(Color.BLUE);
|
|
|
|
}
|
2024-07-08 15:12:08 +00:00
|
|
|
this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
|
|
|
|
}
|
2024-07-07 14:29:45 +00:00
|
|
|
|
2024-07-07 18:34:38 +00:00
|
|
|
// Wenn Weg gefunden, brich ab
|
|
|
|
if (nextVertex.getElement() == n2) {
|
|
|
|
MarkedVertex<T> colorroute = n2;
|
|
|
|
while (colorroute != null) {
|
|
|
|
textDescription = colorroute.getName();
|
|
|
|
System.out.println(textDescription);
|
|
|
|
colorroute.getScreenVertex().setColor(Color.green);
|
|
|
|
this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
|
|
|
|
|
|
|
|
colorroute = predecessors.get(colorroute);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//zurücksetzten der Färbungen
|
|
|
|
this.clearScreenGraphColor();
|
|
|
|
return distance.get(n2);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2024-07-07 14:29:45 +00:00
|
|
|
// Gehe von diesem Knoten aus alle erreichbaren Knoten durch
|
|
|
|
for (MarkedVertex<T> i: this.getNeighbours(nextVertex.getElement())) {
|
|
|
|
|
|
|
|
// Kante finde, die den jetzigen und nächsten Knoten verbindet
|
|
|
|
for (MarkedEdge<U> j: this.getAllEdges()) {
|
|
|
|
if (j.getSource() == nextVertex.getElement() && j.getDestination() == i) {
|
|
|
|
|
|
|
|
//Berechnung der Heuristik über die Luftdistanz des nächsten Knoten zum Zielknoten
|
2024-07-08 15:12:08 +00:00
|
|
|
airDist = Math.sqrt(Math.pow((i.getCords()[0] - n2.getCords()[0]), 2)
|
|
|
|
+ Math.pow((i.getCords()[1] - n2.getCords()[1]), 2)) / 100;
|
2024-07-07 14:29:45 +00:00
|
|
|
|
|
|
|
// Berechne Distanz zu nächstem Knoten
|
|
|
|
EdgeWeightMarking marking = (EdgeWeightMarking) j.getMarking();
|
|
|
|
dist = distance.get(nextVertex.getElement()) + marking.getWeight();
|
|
|
|
distToFinish = distance.get(nextVertex.getElement()) + marking.getWeight() + airDist;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Wenn es schon einen kürzeren Weg zum Knoten gibt, überspringen
|
|
|
|
if ((distance.get(i) <= dist && distance.get(i) != -1) || visited.get(i)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Aktualisiere Distanz von Start zu nächstem Knoten
|
|
|
|
distance.put(i, dist);
|
|
|
|
|
|
|
|
// Logging
|
2024-07-08 15:12:08 +00:00
|
|
|
textDescription = "Add " + i.getName() + " with " + distToFinish + " weight to queue.";
|
2024-07-07 14:29:45 +00:00
|
|
|
System.out.println(textDescription);
|
2024-07-07 21:39:17 +00:00
|
|
|
if (i.getScreenVertex().getColor() != Color.RED) {
|
|
|
|
i.getScreenVertex().setColor(Color.YELLOW);
|
|
|
|
}
|
2024-07-07 14:29:45 +00:00
|
|
|
this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
|
|
|
|
|
|
|
|
// Nehme nächsten Knoten in die Queue auf
|
|
|
|
queue.add(new WrapperElement<>(i, distToFinish));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
//zurücksetzten der Färbungen
|
|
|
|
this.clearScreenGraphColor();
|
|
|
|
|
2024-07-07 18:34:38 +00:00
|
|
|
MarkedVertex<T> colorroute = n2;
|
|
|
|
while (colorroute != null) {
|
|
|
|
textDescription = colorroute.getName();
|
|
|
|
System.out.println(textDescription);
|
|
|
|
colorroute.getScreenVertex().setColor(Color.green);
|
|
|
|
this.logList.add(new OurLogElement(step, textDescription, 0, this.getScreenGraphCopy()));
|
|
|
|
|
|
|
|
colorroute = predecessors.get(colorroute);
|
|
|
|
}
|
|
|
|
|
2024-07-07 14:29:45 +00:00
|
|
|
System.out.println("Done");
|
|
|
|
// Gibt Distanz zu gefragtem Knoten zurück
|
|
|
|
return distance.get(n2);
|
2024-07-03 19:49:51 +00:00
|
|
|
}
|
2024-06-15 14:48:28 +00:00
|
|
|
}
|