Java tutorial for beginners

2014-12-26

ConcurrentHashMap is very similar to HashTable but it provides better concurrency level. You might know , you can synchonize HashTable using Collections...

2014-08-04

A binary tree is a tree data structure in which each node has at most two children, which are referred to as the left child and the right child Example...

2014-08-04

In this post, we will see about program to print all paths from root to leaf in a binary tree in java. Below diagram will show all paths  from root to...

2014-08-04

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...

2014-07-20

In this post, we will see about program to count leaf nodes in a binary tree in java Algorithm- Steps for counting number of leaf nodes are: If node...

2014-07-20

In this post, we will see about program to print leaf nodes in a binary tree in java Algorithm- Steps for counting number of leaf nodes are: If node...

2014-07-19

In this post, we will see about Level Order binary tree traversal in java. Level Order traversal: Level order traversal of below tree will be: We will...

2014-07-19

This is one of the frequently asked question in core java interview so in this post, we will see how HashSet works in java.We have already seen How hashMap...

2014-07-17

In this post, we will see about PostOrder binary tree traversal in java. PostOrder traversal: In PostOrder traversal,each node is processed after subtrees...

2014-07-16

In this post, we will see about InOrder binary tree traversal in java. InOrder traversal: In InOrder traversal,each node is processed between subtrees...