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So my latest assignment's having me write a recursive method that can traverse a binary tree and return the data in a List. The catch? I can't pass anything in and I can't make any new instance variables.

How and why

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So my latest assignment's having me write a recursive method that can traverse a binary tree and return the data in a List. The catch? I can't pass anything in and I can't make any new instance variables. How and why

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java

So my latest assignment's having me write a recursive method that can traverse a binary tree and return the data in a List. The catch? I can't pass anything in and I can't make any new instance variables.

How and why