先写一个方法,传入两棵根节点值相同的树,判断tree1是否和tree2结构一样 public boolean doesTree1HasTree2(TreeNode tree1, TreeNode tree2){ if ( tree2 == null ){ return true; } if ( tree1 == null ){ return false; } if ( tree1.val != tree2.val ){ return false; } return do...