Took the help from:
- https://github.com/ganmohim/JavaConcept/tree/master/src
- https://github.com/yrojha4ever/JavaStud
- https://github.com/HackBulgaria/Core-Java-1 (Already copied)
- https://github.com/HackBulgaria/Core-Java-2 (Already copied)
- https://github.com/amit4alljava/CoreJava230W (Already copied)
- https://github.com/lshimokawa/java-samples
- https://github.com/Mann02/java
- https://github.com/tfunato/java-samples
- https://github.com/xpadro/concurrency
- http://xpadro.blogspot.in/2014/09/java-concurrency-tutorial.html
- https://github.com/javaee-samples/javaee7-samples
- https://github.com/shekhargulati/java8-the-missing-tutorial
- https://github.com/winterbe/java8-tutorial
- https://github.com/cirosantilli/java-cheat
- https://github.com/CoachEd/JavaExamples
- https://github.com/taywils/java_spark_tutorial
- http://taywils.me/2013/11/05/javasparkframeworktutorial.html
- https://github.com/Nirman-Rathod/Java/blob/master/JavaPowershell/src/com/java/powershell/ExecuteCommand.java
- https://github.com/JavaK2/java8-tutorial
- https://github.com/rahmanusta/Java8/tree/master/src
- https://github.com/datalogics/pdf-java-toolkit-samples
- https://github.com/ashishsharma/ashish