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Update ListUDG.java #10

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20 changes: 20 additions & 0 deletions source/graph/basic/udg/java/ListUDG.java
Original file line number Diff line number Diff line change
Expand Up @@ -129,12 +129,32 @@ public ListUDG(char[] vexs, char[][] edges) {
* 将node节点链接到list的最后
*/
private void linkLast(ENode list, ENode node) {

// 判断list中是否有node
if(hasNode(list, node))
return;


ENode p = list;

while(p.nextEdge!=null)
p = p.nextEdge;
p.nextEdge = node;
}

// 单链表的查询功能
private boolean hasNode(ENode list, ENode node) {
if(list == null) {
return false;
}

ENode n = list;
if(n.index == node.index){
return true;
}else{
return hasNode(n.next, node);
}
}

/*
* 返回ch位置
Expand Down