Java problems and solutions

Problems and solutions in Java with Unit Tests (JUnit 4)

Setup and run the code

• Import the project in Eclipse as existing Maven project.
• Setup the build and set the goals with: clean install
• Setup the run configuration using JUnit 4 and compile the whole workspace so Eclipse will run all tests

Data types and Data Structures

Data types

• Primitive Types: int, double, String, char etc.
• Wrapper classes: String, Integer, Double, Boolean etc.

Linear Data Structures

• Lists: Arrays, Map, HashMap, Set, Matrix
• Linked Lists: Singly Linked List, Doubly Linked List, Circular Linked List
• Stack
• Queue

Others:

• Enumeration
• BitSet
• Vector
• Heap
• Dictionary
• Hashing: Hashtable
• Properties
• Graph
• BST
• Trees: Binary Tree, Binary Search Tree, Trie, Segment Tree and Suffix Tree

Links

• https://www.geeksforgeeks.org/data-structures/

Coding interviews

• http://java67.blogspot.sg/2012/09/10-linux-and-unix-interview-questions-answers-wipro-tcs-capegemini.html
• http://java67.blogspot.sg/2012/09/java-collection-interview-questions.html
• http://www.java67.com/2012/08/10-java-coding-interview-questions-and.html
• http://www.java67.com/2015/12/top-30-oops-concept-interview-questions-answers-java.html
• http://www.java67.com/2015/09/top-10-restful-web-service-interview-questions-answers.html
• http://www.java2novice.com/java-interview-programs/

Resources

• 50 Java programs from coding interviews
• Java Trees
• Array push