ublic class Node{
private List childNodes;
public List<Node> getChildNodes() {
return childNodes;
}
public void setChildNodes(List<Node> childNodes) {
this.childNodes = childNodes;
}
public static long countNodeNum(Node tree) {
long count=0;
if(tree.getChildNodes()!=null) {
count++;
count=count+countNodeNum( tree.getChildNodes().get(0));
}
return count;
}
public static void main(String[] args) {
}
我想问各位大佬 get(0)有什么作用的