Data Structure Puzzles

Continuing on the quick revision of important questions for my Interviews. These are good puzzles or questions related to Data Structures. (All are in Java)

Reverse a Linked List
Circular Linked List
Dijkstra's Algorithm
Self-Balancing Tree

Enjoy!

Sorting Algorithms in Java

Just doing a quick revision of important sorting algorithms for my Interviews.

Quick Sort
Merge Sort
Heap Sort

All of them are targeted for Java SE 7!