力扣上的一道简单的题，但不知道哪里出问题了

Question

/**

• Definition for a binary tree node.

• public class TreeNode {

• int val;
  

• TreeNode left;
  

• TreeNode right;
  

• TreeNode() {}
  

• TreeNode(int val) { this.val = val; }
  

• TreeNode(int val, TreeNode left, TreeNode right) {
  

•     this.val = val;
  

•     this.left = left;
  

•     this.right = right;
  

• }
  

• }

• /
  class Solution {
  public boolean isSameTree(TreeNode p, TreeNode q) {

    if(p==null&&q==null)
      return true;
    else if(p==null||q==null)
      return false;
    else if(p.val!=q.val)
    {
        return false;
    }
    if (isSameTree(p.left,q.left)&&isSameTree(p.right,q.right)){
        return true;
    }
    return true;
  

  }
  }

Answer 1

最后一个

return false;