类treenode中的构造函数treenode不能应用于java中的给定类型?
我想初始化一个空的类treenode中的构造函数treenode不能应用于java中的给定类型?,java,debugging,treenode,Java,Debugging,Treenode,我想初始化一个空的TreeNode,但遇到如下错误: /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ class Solution { public TreeNode buildTr
TreeNode
,但遇到如下错误:
/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/
class Solution {
public TreeNode buildTree(int[] preorder, int[] inorder) {
TreeNode ans = new TreeNode();
if(preorder.length == 0) return ans;
// do something
return ans;
}
如何解决此错误?使用参数定义构造函数时,必须显式定义默认构造函数
constructor treenode in class treenode cannot be applied to given types
使用参数定义构造函数时,必须显式定义默认构造函数
constructor treenode in class treenode cannot be applied to given types