0_0_23160590_4942\Main.java:30: 错误: 未结束的字符文字
* eats the largest chunk out of the remaining distance, hence, “greedy" * @param start start node * @param end end node */ public static void GBFS(String start, String end) { Graph roads = new Graph(); roads.init(); AdjList adjList = roads.graph.get(start); System.out.println("Greedy Best First Search Starts!"); AdjNode startNode = findNode(adjList, start); System.out.print("start from node: \n" + start + "(" + startNode.cost + ")" + "-->"); int totalCost = 0; while (adjList.size() > 0) { AdjNode nextNode = adjList.poll(); int nodeCost = nextNode.cost; totalCost += nodeCost; System.out.print(nextNode.name + "(" + nodeCost + ")-->"); adjList = roads.graph.get(nextNode.name); if (isExist(adjList, end)) { int lastNodeCost = adjList.poll().cost; totalCost += lastNodeCost; System.out.println(end + "(" + lastNodeCost + ")."); System.out.println("find path! \ntotal cost is : " + totalCost); return; } } } /** * init Touring in Romania road map */ public void init() { graph = new HashMap<>(); String name = "Arad"; int cost = 366; AdjList adjList = new AdjList(); adjList.add(new AdjNode("Arad", 366)); adjList.add(new AdjNode("Zerind", 374)); adjList.add(new AdjNode("Sibiu", 253)); adjList.add(new AdjNode("Timisoara", 329)); graph.put(name, adjList); name = "Sibiu"; adjList = new AdjList(); adjList.add(new AdjNode("Fagaras", 176)); adjList.add(new AdjNode("Rimnicu", 193)); adjList.add(new AdjNode("Rimnicu", 380)); graph.put(name, adjList); name = "Fagaras"; adjList = new AdjList(); adjList.add(new AdjNode("Sibiu", 253)); adjList.add(new AdjNode("Bucharest", 0)); graph.put(name, adjList); } /** * whether the node name is in the adjlist * * @param adjList * @param name * @return */ public static boolean isExist(AdjList adjList, String name) { for (AdjNode n : adjList) { if (n.name.equals(name)) { return true; } } return false; } /** * find a node by name * * @param adjList * @param name * @return */ public static AdjNode findNode(AdjList adjList, String name) { for (AdjNode n : adjList) { if (n.name.equals(name)) { return n; } } return null; }}/** * adjacent list * priority queue */class AdjList extends PriorityQueue<AdjNode> {}/** * adjacent node */class AdjNode implements Comparable<AdjNode> { String name; int cost; public AdjNode(String name, int cost) { this.name = name; this.cost = cost; } @Override public int compareTo(AdjNode o) { return Integer.compare(cost, o.cost); } @Override public String toString() { return "AdjNode{" + "name='" + name + '\' ' + ", cost=" + cost + '}'; }}
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0_0_23160590_4942\Main.java:30: 错误: 未结束的字符文字
* eats the largest chunk out of the remaining distance, hence, “greedy" * @param start start node * @param end end node */ public static void GBFS(String start, String end) { Graph roads = new Graph(); roads.init(); AdjList adjList = roads.graph.get(start); System.out.println("Greedy Best First Search Starts!"); AdjNode startNode = findNode(adjList, start); System.out.print("start from node: \n" + start + "(" + startNode.cost + ")" + "-->"); int totalCost = 0; while (adjList.size() > 0) { AdjNode nextNode = adjList.poll(); int nodeCost = nextNode.cost; totalCost += nodeCost; System.out.print(nextNode.name + "(" + nodeCost + ")-->"); adjList = roads.graph.get(nextNode.name); if (isExist(adjList, end)) { int lastNodeCost = adjList.poll().cost; totalCost += lastNodeCost; System.out.println(end + "(" + lastNodeCost + ")."); System.out.println("find path! \ntotal cost is : " + totalCost); return; } } } /** * init Touring in Romania road map */ public void init() { graph = new HashMap<>(); String name = "Arad"; int cost = 366; AdjList adjList = new AdjList(); adjList.add(new AdjNode("Arad", 366)); adjList.add(new AdjNode("Zerind", 374)); adjList.add(new AdjNode("Sibiu", 253)); adjList.add(new AdjNode("Timisoara", 329)); graph.put(name, adjList); name = "Sibiu"; adjList = new AdjList(); adjList.add(new AdjNode("Fagaras", 176)); adjList.add(new AdjNode("Rimnicu", 193)); adjList.add(new AdjNode("Rimnicu", 380)); graph.put(name, adjList); name = "Fagaras"; adjList = new AdjList(); adjList.add(new AdjNode("Sibiu", 253)); adjList.add(new AdjNode("Bucharest", 0)); graph.put(name, adjList); } /** * whether the node name is in the adjlist * * @param adjList * @param name * @return */ public static boolean isExist(AdjList adjList, String name) { for (AdjNode n : adjList) { if (n.name.equals(name)) { return true; } } return false; } /** * find a node by name * * @param adjList * @param name * @return */ public static AdjNode findNode(AdjList adjList, String name) { for (AdjNode n : adjList) { if (n.name.equals(name)) { return n; } } return null; }}/** * adjacent list * priority queue */class AdjList extends PriorityQueue<AdjNode> {}/** * adjacent node */class AdjNode implements Comparable<AdjNode> { String name; int cost; public AdjNode(String name, int cost) { this.name = name; this.cost = cost; } @Override public int compareTo(AdjNode o) { return Integer.compare(cost, o.cost); } @Override public String toString() { return "AdjNode{" + "name='" + name + '\' ' + ", cost=" + cost + '}'; }}
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