The following exercises is a method to be added to the IntTree class from this chapter. You may define additional private methods to implement your public method if necessary. Several problem descriptions refer to the following reference binary trees:
Write a method called equals that accepts another binary tree of integers as a parameter and compares the two trees to see whether they are equal to each other. For example, if variables of type IntTree called t1 and t2 have been initialized, then t1.equals(t2) will return true if the trees are equal and false otherwise. Two empty trees are considered to be equal to each other.
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