What is a Tree?

A tree is an abstract data type which is structured like a tree. It has a root node with 2 or more branches offshooting from the root. It can be represented recursively such as each of the node can act as a root in itself. Example below.

There can be multiple implementations of the Tree ADT(abstract data type) like Binary tree, Binary Search tree. Heap is also based on the tree structure.

core java 12

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