java - Compare two binary trees to see if they have the same structure -


another easy 1 can't seem it. need write method compares structures of 2 binary trees , returns weather same or not. data , data types not important structures. here examples:

examples!

here code have far. think close.

public boolean samestructure(orderedset<e> other) {     if (other.size() != size)         return false;     return samestructurehelp(other, root, other.root); }  private boolean samestructurehelp(orderedset<e> other, treenode ref,         treenode otherref) {     if (otherref == null && ref != null)         return false;     if (otherref != null && ref == null)         return false;     samestructurehelp(other, ref.left, otherref.left);     samestructurehelp(other, ref.right, otherref.right);     return true;  }

what pasted right, missing critical piece: instead of checking left , right subtrees, should return and value, mean if trees rooted in current nodes satisfies condition being same stucture.


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