Validate Binary Search Tree in Java

[ShuYiKang]

I'd like to contribute java code to validate binary search tree.

Validation of binary search tree includes:

• Ensuring that the value of the node in the left subtree is smaller than current node
• Ensuring that the value of the node in the right subtree is greater than current node
• Ensuring left and right subtrees are also binary search trees

[error707-persona]

Hey can you assign this one to me?

[priddhesh]

Hey can you assign me ?