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+package leetcode.invert_binary_tree;%0A%0Aimport common.TreeNode;%0A%0Apublic class Solution %7B%0A    public TreeNode invertTree(TreeNode root) %7B%0A        if(root != null)%7B%0A            TreeNode tmp = root.left;%0A            root.left = root.right;%0A            root.right = tmp;%0A            invertTree(root.left);%0A            invertTree(root.right);%0A        %7D%0A        return root;%0A    %7D%0A%7D%0A

Add java solution for 226. Invert Binary Tree