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採用鄰接表我想實現使用從以下資源鄰接表在Java中無向圖來實現圖形:http://www.geeksforgeeks.org/graph-and-its-representations/如何在Java
代碼運行沒有任何錯誤,但不給任何輸出。這裏是代碼:
class AdjListNode{
int dest;
AdjListNode next;
public AdjListNode(int dest){
this.dest = dest;
this.next = null;
}
}
class AdjList{
AdjListNode head;
}
public class graph{
int V;
AdjListNode newNode;
AdjList array[];
public graph(int V){
this.V = V;
this.array = new AdjList[V];
int i;
for(i=0;i<V;++i){
this.array[i].head = null;
}
}
void addEdge(graph g, int src, int dest){
newNode = new AdjListNode(dest);
newNode.next = g.array[src].head;
g.array[src].head = newNode;
newNode = new AdjListNode(src);
newNode.next = g.array[dest].head;
g.array[dest].head = newNode;
}
void printGraph(graph g){
int v;
for(v=0;v < g.V;++v){
AdjListNode pCrawl = g.array[v].head;
System.out.println();
System.out.println("Adjacency list of vertex "+v);
System.out.print("head");
while(pCrawl != null){
System.out.print(pCrawl.dest);
pCrawl = pCrawl.next;
}
System.out.println();
}
}
public static void main(String[] args){
int V = 5;
graph g = new graph(V);
g.addEdge(g,0,1);
g.addEdge(g,0,4);
g.addEdge(g,1,2);
g.addEdge(g,1,3);
g.addEdge(g,1,4);
g.addEdge(g,2,3);
g.addEdge(g,3,4);
g.printGraph(g);
}
}
請幫忙!
當前輸出是什麼? – CMPS
我在終端沒有得到任何輸出。但在eclipse中,它引發了'NullPointerException'。 –
是的,它是預計!我在我的答案中發佈了修復程序 – JavaHopper