# Spiral/Zigzag level order traversal of binary tree in java

If you want to practice data structure and algorithm programs, you can go through 100+ java coding interview questions.

This is 6th part of java binary tree tutorial.

In this post, we will see about Spiral/Zigzag Level Order binary tree traversal in java.

#### Spiral/Zigzag Level Order traversal:

Spiral/Zigzag Level order traversal of below tree will be:

Steps for solution:

1. Create an empty stack s and push root to it.
2. while stack is not NULL Do following
1. Create a empty stack called tempStack.
2. Pop a node from stack and push it to tempStack depending on directionFlag
3. Change directionFlag to change the direction of traversal
4. set stack=tempStack
Example:
Lets say your binary tree is :

So Spiral/Zigzag Level Order traversal will work as below:

Lets create java program for Spiral/Zigzag Level traversal:

Run above program and you will get following output:

## Java Binary tree tutorial:

Please go through java interview programs for more such programs.

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