Added core java examples project

Author: avulalakshman

core-java/corejava/.gitignore

@@ -0,0 +1,2 @@
+/bin
+/bin/*

core-java/corejava/Threads.docx

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+url=jdbc:mysql://localhost:3306
+user=lakshman
+password=${password}
+
+users[0].name=krish
+users[1].name=Charan
+users[2].name=Manoj
+# YML/YAML or .properties
+
+greetings=com.lwl.cj.day30.NGreetings

core-java/corejava/db.properties

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+1001,Krish,35,CS
+1015,Kiran,48,CS
+1003,Mahesh,48,CS
+1050,CV,23,EC
+1005,Amala,22,IS
+1006,Charan,33,CS
+1007,Kaml,31,IS
+1008,John,24,CS
+1010,Krish,45,IS
+1020,Kiran,25,EC