Some Java References

General Reference Sites

• Non-technical introduction to Java: http://sepwww.stanford.edu/data/media/public/sep/jon/family/jos/oop/DontFearTheOOP.pdf
  A lovely, novel-like introduction to Java for non-programmers; HTML version is here: http://sepwww.stanford.edu/sep/jon/family/jos/oop/index.html
  
  
• Free, complete video course on Java for Beginners: https://www.udemy.com/java-tutorial/
  
  
• A simple overview of Java: http://code.tutsplus.com/tutorials/learn-java-for-android-development-introduction-to-java--mobile-2604
  A very simple 5-page non-technical introduction to Java, including OOP and inheritance, in the context of Android app development
• CheatSheet for Java: http://introcs.cs.princeton.edu/java/11cheatsheet/
  A very nice, concise cheat-sheet reference for Java
• One-page Intro to Java: http://www3.ntu.edu.sg/home/ehchua/programming/java/j1a_Introduction.html
  A concise, one-page introduction to the basics only of Java
• LeePoint Java Notes: http://leepoint.net/
  • LeePoint Java Basics Tutorial: http://www.leepoint.net/JavaBasics/index.html
  
  
  
• Sites with a LOT of examples of Java programs and snippets:
  • Excellent and comprehensive site of Java snippets: http://www.java2s.com/Tutorial/Java/CatalogJava.htm
    • Examples of Java API: http://www.programcreek.com/java-api-examples/
  • Like Snakify, HackerRank is a great place for programming challenges with lots of test cases: https://www.hackerrank.com/
  • One of the best Java example sites with full programs: http://www.javaexamples.org/
  • Java Almanac with a lot of examples: http://www.exampledepot.8waytrips.com/egs/index.html
  • Real's HowTo with tons of examples on all aspects of Java: http://www.rgagnon.com/topics/java-language.html
  • Full example programs on all aspects of Java: http://www.java2s.com/Code/Java/CatalogJava.htm
  • Excellent samples from Y. Liang's Java text, along with a button to actually compile/run the example code online! https://media.pearsoncmg.com/ph/esm/ecs_liang_ijp_10/ExampleByChapters.html
• Very nice introductory Java Tutorials and Introductions
  • Examples of introductory Java programs for beginners http://www.programmingsimplified.com/java-source-codes
  • Head First Java sample introductory tutorials: http://www.javaranch.com/campfire.jsp
  • Java Tutorials on Basic to Advanced Topics http://www.tutorialspoint.com/java/index.htm
  • Official Big Index of the Java Tutorials and Lessons from Oracle: http://docs.oracle.com/javase/tutorial/reallybigindex.html
  • Java Tutorials and Introduction, including Programming Interview Questions: http://www.javatpoint.com/
• A series of challenging programming/mathematical problems for you to cut your teeth upon: http://projecteuler.net/
• PDF Cheatsheet of Swing and SWT GUI components: http://fhe.technikum-wien.at/~poeial/java/javaguidev.pdf

Java Video Lectures

• Video on Installing and Using Eclipse http://www.youtube.com/watch?v=CE8UIbb_4iM Great video on how to install and run Eclipse
  • Assumes you have the Java JDK SE installed.
• Eclipse Video Tutorials for Total Beginners http://eclipsetutorial.sourceforge.net/totalbeginner.html 16 very good video lessons on using Eclipse to develop Java programs
  • Instructions on how to use the tutorials http://eclipsetutorial.sourceforge.net/instructions.html
    You can view lesson 1 without downloading it right here.
• Using NetBeans to construct a simple program with two classes http://elketeaches.wordpress.com/2012/04/23/screen-casting-how-to-create-java-class-using-netbeans/
• Video lectures introducing programming in NetBeans https://www.youtube.com/watch?v=rKu632psaZ8
• Michael Fudge's Video lectures introducing programming in NetBeans https://www.youtube.com/playlist?list=PLyRiRUsTyUXhUXoOPEdMZWhGpGeSQFZgH
• TheNewBoston Education's Video Tutorials https://www.thenewboston.com/videos.php TheNewBoston Education's Bucky Roberts has some GREAT videos on C++, Java, PHP, etc.
  • List of Beginner Java Video Tutorials https://www.thenewboston.com/videos.php?cat=31 They also have intermediate and advanced tutorials after this.
  • Sample Tutorial 14 on Multiple Classes http://www.youtube.com/watch?v=XqTg2buXS5o
  • Sample Tutorial 55 on Polymorphism http://www.youtube.com/watch?v=0xw06loTm1k
• Derek Banas' Java Video Tutorials http://www.youtube.com/user/derekbanas Derek Banas' set of videos on learning Java, Java Algorithms, Object Oriented Design, etc.
• mybringback's Java Video Tutorials http://www.youtube.com/playlist?list=PLDAA5DE54FB5215EC mybringback's set of videos on learning Java and also Android programming
• Java Video Tutorial on Scanners http://www.youtube.com/watch?v=5DdacOkrTgo Very nice lesson on how to get input in Java using Scanner (equivalent to cin in C++).
• Java Video Tutorial on Introduction to Java http://www.youtube.com/watch?v=3u1fu6f8Hto A nice lesson in the basics of Java from the Patrick Videos collection.
• Nice video series on writing JUnit tests https://www.youtube.com/watch?v=M_6z8L8qK8o The second video on JUnit testing using a TDD approach is here: https://www.youtube.com/watch?v=nuv-GzqAh28)
• Video on expressing code in pseudocode http://www.youtube.com/watch?v=Rg-fO7rDsds What exactly is pseudcode?
• Video on converting pseudocode to Java https://www.youtube.com/watch?v=vCAPQjg8xQM Very nice video on converting pseudocode to Java

Books, etc.

Good Printed Books (not free)

• Simple C++: Featuring Robodog and the Profound Object-Oriented Programming Method (POOP) by Jeffrey M. Cogswell
  
• The Waite Group's Mitchell Waite Signature Series: Object-Oriented Design in Java by Bill McCarty and Stephen Gilbert
  

Good Online Books (for free!)

• Head First Java by Kathy Sierra and Bert Bates
  
• Java Programming for Kids, Parents and Grandparents by Yakov Fain
  
• Beginner's Books: Java tutorial: Learn Java Programming with examples
• JavaTech: Introduction to Scientific and Technical Computing with Java by Lindsey, Tolliver, and Lindblad
  
• Thinking in Java by Bruce Eckel
  
• Thinking in Patterns with Java by Bruce Eckel
  
• How to Think Like a Computer Scientist by Allen B. Downey
  
• Introduction to Programming using Java by David J. Eck
  
• Securing Java by Gary McGraw and Ed Felten
  
• Introduction to Computer Science using Java by Bradley Kjell
• The Java Tutorial by Sun

Good references/tutorials

• Short tutorial on Java and Western novels http://sepwww.stanford.edu/sep/jon/family/jos/oop/oop1.htm A java tutorial that shows you why Coding Java (or any other object-oriented programming) is just like writing a trashy Western novel.
• Official Java Tutorial TRAILS and Lessons from Oracle: http://docs.oracle.com/javase/tutorial/
• Head First Java sample introductory tutorials: http://www.javaranch.com/campfire.jsp
• Java Tutorials on Basic to Advanced Topics http://www.tutorialspoint.com/java/index.htm Nice set of tutorials on Basic to Advanced Topics in Java.
• The Java Almanac http://www.exampledepot.8waytrips.com/ Over a thousand useful examples to copy and paste these examples directly into your applications.
• Java Coding Samples http://www.cs.utexas.edu/~scottm/cs307/codingSamples.htm Many great examples and sample programs in Java.
• LeePoint Java Notes http://leepoint.net/notes-java/index.html GREAT set of Java Programming Notes on all aspects of Java
• LeePoint Java Basics Tutorial http://www.leepoint.net/JavaBasics/index.html GREAT Tutorial introduction to OOP and basics of Java.
• Wonderful Tutorial on Pass-By-Value vs. Pass-By-Reference http://www.javaranch.com/campfire/StoryPassBy.jsp Also has other excellent tutorials on Java and is derived from the Head First Java series.
• Sun's Java Books/Tutorials http://java.sun.com/docs/books/tutorial/
• A Beginning Programmer's Guide to Java: http://beginwithjava.blogspot.com/2011/05/your-own-java-classes.html A wonderful introduction on how to build your first class in Java!
  • Another great intro on how to build a basic graphics application: http://beginwithjava.blogspot.com/2008/07/most-basic-graphics-app.html
• Java Programming Notes: Excellent online "cheatsheet" and tutorial by Fred Swartz http://www.ensta.fr/~diam/java/online/notes-java/GUI/basics/guitips.html
• Java tutorials for all levels: http://www.java-made-easy.com/
  • E.g., here is their detailed introduction to using Scanner: http://www.java-made-easy.com/java-scanner.html
• Java Tutorial http://home.cogeco.ca/~ve3ll/jatutor0.htm A set of 18 excellent tutorials summarize the fundamental concepts in Java.
• Another very nice Java Tutorial Guru99 Java Tutorial Covers everything except GUI development
• Great reference for Beginning Java http://beginwithjava.blogspot.com/2008/07/controlling-javas-graphics.html Beginning Programmer's guide to Java.
• Topics in Java - Tutorial http://courses.coreservlets.com/Course-Materials/java5.html Some interesting and advanced topics in Java.
• NetBeans-based Java Tutorials http://www.homeandlearn.co.uk/java/java.html Nice set of NetBeans-based Java tutorials.

GUIs, Graphics, and Animations

Introducing Swing Applications

• An excellent introduction to GUI in Java: https://www3.ntu.edu.sg/home/ehchua/programming/java/j4a_gui.html
• Some very simple examples of GUI Swing Applications http://zetcode.com/tutorials/javaswingtutorial/firstprograms/ Very nice introductory Swing GUI applications
• Excellent guide on how to create a Swing GUI http://www.wikihow.com/Create-a-Swing-GUI-in-Java Excellent article about how to create a Swing GUI step-by-step
• PDF Cheatsheet of Swing and SWT GUI components: http://fhe.technikum-wien.at/~poeial/java/javaguidev.pdf

Layout Managers

• GREAT guide on how to nest layout managers http://javadude.com/articles/layouts/#nesting Has some wonderful tips, including drawing your GUI first, etc.
  • Wonderful guide on placing components in a JPanel/JFrame http://www.mathcs.emory.edu/~cheung/Courses/377/Syllabus/8-JDBC/GUI/layout.html
• Different Java Layouts http://www.javafaq.nu/java-book-15.html Very nice little comparison of the different layout managers in Java with a diagram showing the different layouts side-by-side.
• Oracle's Visual Guide to different Java Layouts http://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html Part of their official tutorials

Listeners and Inner classes

• Three main ways to handle events handling_events.html Excellent introductory notes on how to handle events from Deitel &Deitel's text
• What is an inner class? http://www.learn-java-tutorial.com/Java-Comparisons.cfm Very nice introduction to Inner Classes/Nested Classes
• How to use Inner-Class Listeners http://www.leepoint.net/notes-java/GUI/events/inner_class_listener.html Very nice introduction to using Inner-Class Listeners

JButtons

• A super-simple, minimal working example of a JButton in a JFrame http://forum.codecall.net/topic/41873-basic-jframe-with-a-basic-jbutton/ A very simple, small example you can use to build more complex JButton-based programs
  • A modified version of the above program: Foo.java
• How to use JButtons http://www.leepoint.net/notes-java/GUI/components/20buttons/10jbutton.html Very nice introduction to using JButtons
• How to use multiple JButtons http://www.dreamincode.net/forums/topic/234827-multiple-buttons-to-same-action-listener/ A nice thread on how to setup and use multiple JButtons (c.f., the last post for an elegant solution)

JRadioButtons

• LeePoint notes on JRadioButton methods: http://www.leepoint.net/notes-java/GUI/components/50radio_buttons/25radiobuttons.html
• How to use Radio Buttons http://journals.ecs.soton.ac.uk/java/tutorial/post1.0/ui/radiobutton.html Very nice introduction to using JRadioButtons
• Great example of how to use JRadioButtons and an ActionListener http://java2everyone.blogspot.com/2009/01/get-selected-jradiobutton.html Great example of how to use JRadioButtons, an ActionListener, and isSelected
• JRadioButtons with an Inner Class and isSelected(): http://stackoverflow.com/questions/15387570/common-action-listener-for-3-buttons
• JRadioButtons with an inner class: http://journals.ecs.soton.ac.uk/java/tutorial/post1.0/ui/radiobutton.html
• JRadioButtons with an interface: http://examples.javacodegeeks.com/desktop-java/swing/jradiobutton/get-selected-jradiobutton-from-buttongroup/
• JRadioButtons with an interface: http://www.macs.hw.ac.uk/guidebook/?name=JRadioButton&page=1

JTextFields

• How to use JTextFields http://www.leepoint.net/GUI/components/30textfield/11textfield.html Very nice introduction to using JTextFields
• Great example of how to use JTextFields http://exampledepot.8waytrips.com/egs/javax.swing.text/tf_TextField.html Very nice introduction to using JTextFields using an Inner Class Listener
• Another example of how to use JTextFields http://www.javamex.com/tutorials/swing/text_fields_labels.shtml Very nice introduction to using JTextFields using an Anonymous Class Listener
• A nice video of how to create and handle JTextFields https://www.youtube.com/watch?v=8W5nioLg-Yk Very nice introduction to using JTextFields using an Anonymous Class Listener
• Two nice examples of how to use JTextFields http://www.javabeginner.com/java-swing/java-jtextfield-class-example The second example is especially nice.

Handling Mouse Events

• Excellent simple example of how to handle MouseListener http://forum.codecall.net/topic/38296-java-mouselistener/ Excellent introduction to handling the MouseListener interface for mouse buttons (press, release, click) and mouse cursor (enter/leave area)
• How to handle MouseMotionListener http://way2java.com/awt-events/java-mousemotionlistener/ Very nice introduction to handling MouseMotionListener for moving or dragging the mouse cursor
• How to use a MouseAdapter http://www.roseindia.net/java/example/java/awt/MouseClick.shtml Simple example of using the MouseAdapter class for mouse clicks

Swing and AWT

• How to use Menus in Java programs http://www.java-tips.org/java-se-tips/javax.swing/how-to-create-menu-bar.html Very simple introduction to using menus in your Java programs
• Sun's HTML in Swing Components http://java.sun.com/docs/books/tutorial/uiswing/components/html.html Very nice introduction to using HTML in Swing Components
• Sun's Mixing heavy and light components: Swing and AWT http://java.sun.com/products/jfc/tsc/articles/mixing/ Very nice introduction to Swing and its relationship to AWT and how to use them together
• AWT vs. Swing http://www.ibm.com/developerworks/grid/library/os-swingswt/ Very nice comparison of AWT and Swing
• AWT vs. Swing http://java-antony.blogspot.com/2007/07/swing-vs-awt-or-lightweight-vs.html Another nice comparison of AWT and Swing

Graphics/Animations

• General guide to Graphics and Painting: http://math.hws.edu/eck/cs124/javanotes6/c6/s3.html Nice, detailed introduction to Graphics and Painting in Java
• A Beginning Programmer's Guide to Java: http://beginwithjava.blogspot.com/2008/07/most-basic-graphics-app.html Great guide from a beginning programmer's perspective on how to setup a very basic Graphics application
  • Controlling Java Graphics via paintComponent() and repaint(): http://beginwithjava.blogspot.com/2008/07/controlling-javas-graphics.html
• Passing a Graphics Context to other classes/methods: http://www.ntu.edu.sg/home/ehchua/programming/java/J4b_CustomGraphics.html#zz-5. Very nice explanation via examples of how to send a graphics context to classes that don't have a component on which to paint. Also see Example 3 for a simpler, yet more advanced, perspective.
  • Another example is to see how drawCurrentShape() uses a graphics context variable here: http://www.leepoint.net/notes-java/examples/mouse/paintdemo.html
• Simple Animation and threads http://101.lv/learn/Java/ch10.htm Great guide about creating animations in Java with a brief introduction to Threads

Misc Java References

• Quick online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://onecompiler.com/ Great free, online compiler for many different languages
• Excellent online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://www.onlinegdb.com/ Connects to GitHub, as well!
• Quick online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://repl.it/ Great online compiler for many different languages (REPL == Read-Evaluate-Print Loop) but behind a registrationwall/paywall now
• Comprehensive online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://www.jdoodle.com/start-coding Also significant IDE functionality
• Powerful online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://paiza.io/en This one lets you upload files and use them there (or at least copy and paste them there)
• One more great online compiler for Java, PHP, Python, C#, etc. http://www.tutorialspoint.com/codingground.htm One more free, online compiler for many different languages (used to be http://compileonline.com/ )
• Yet one more great online compiler for Java, PHP, Python, C#, etc. https://codepad.remoteinterview.io/pads Yet one more free, online compiler for many different languages
• Another excellent online compiler for Java, PHP, Python, C#, etc. http://ideone.com/ Another great free, online compiler for many different languages
• Nice online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://www.nitrous.io/ Great free, online compiler for many different languages
• Very nice Java compiler http://www.browxy.com/ Browxy is a free Java compiler, launcher, and publisher; just choose the "Hello World" example program and click "Start".
• Online coding practice and Java compiler http://codingbat.com/ Live coding problems to build coding skill in Java and Python
• Java is pass-by-value only http://www.javaworld.com/article/2077424/learn-java/does-java-pass-by-reference-or-pass-by-value.html Clarify the confusion of pass-by-reference vs pass-by-value in Java

Exception Handling

• All about exceptions! http://people.cs.aau.dk/~torp/Teaching/E04/OOP/handouts/exception_handling.pdf Slides 8 - 10 especially do an excellent job of showing how exception handling is a more gracious solution to handling errors

Instance Variables vs Local Variables vs Class Variables

• Local Variable hides Instance Variable http://programmedlessons.org/java5/Notes/chap34A/ch34A_11.html Difference between local variables and instance variables
• Video on difference between Local Variables and Instance Variable https://www.youtube.com/watch?v=xlg-HhLn3vQ Difference between local variables and instance variables
• Detailed difference between Local Variables, Instance Variables, and Class Variables http://www.fredosaurus.com/notes-java/data/variables/45local-inst-class.html Detailed difference between Local Variables, Instance Variables, and Class Variables

Accessors and Mutators

• Introduction to Accessors and Mutators http://java.about.com/od/workingwithobjects/a/accessormutator.htm Very nice basic introduction.

Instance Variables vs Local Variables vs Class Variables

• Local Variable hides Instance Variable http://programmedlessons.org/java5/Notes/chap34A/ch34A_11.html Difference between local variables and instance variables
• Video on difference between Local Variables and Instance Variable https://www.youtube.com/watch?v=xlg-HhLn3vQ Difference between local variables and instance variables
• Detailed difference between Local Variables, Instance Variables, and Class Variables http://www.fredosaurus.com/notes-java/data/variables/45local-inst-class.html Detailed difference between Local Variables, Instance Variables, and Class Variables

Multiple Classes

• Video: How to add a second class to an existing project http://elketeaches.wordpress.com/2012/04/23/screen-casting-how-to-create-java-class-using-netbeans/ Very nice introductory video
• How to add a new public class to your project http://www.homeandlearn.co.uk/java/java_method_calling.html Another introductory lecture
• Video: Create multiple classes within the same file https://www.youtube.com/watch?v=O3xIiT7PmqU One main public class and the other non-public
• Video: Using multiple classes https://www.youtube.com/watch?v=XqTg2buXS5o From the Bucky, New Boston series
• Video: Basics of Objects and creating a Project with Multiple Classes https://www.youtube.com/watch?v=bggD6fs2OdM Very nice introductory video

Strings, Arrays, and JOptionPanes

• Great guide on formatting strings in Java http://www.rgagnon.com/javadetails/java-0463.html From Reals HowTo on how to use String.format() and System.out.printf()
• Storing an array to a file http://www.coderanch.com/t/524426/java/java/save-array-file Nice working example on how to save an array in a file
• Great guide for various options for JOptionPanes http://www.java2s.com/Tutorial/Java/0240__Swing/UsingJOptionPanewithapredefinedselections.htm Great little guide for all the various options for making/using JOptionPanes

HashMaps

• Very simple example of HashMap http://tutorialswithexamples.com/java-map-and-hashmap-tutorial-with-examples/ Nice and simple example of using HashMap and the first example shows how to loop over all entries using the enhanced for (foreach) loop
• More detailed introduction to HashMaps using examples http://java67.blogspot.com/2013/02/10-examples-of-hashmap-in-java-programming-tutorial.html This shows the various aspects of using HashMaps via examples for each portion
• Different ways to iterate over a HashMap http://javarevisited.blogspot.com/2011/12/how-to-traverse-or-loop-hashmap-in-java.html The first example shows how to loop over all entries using the enhanced for (foreach) loop

Java Swing Timers

• Very Simple Java Swing Example http://examples.javacodegeeks.com/desktop-java/awt/event/a-simple-timer-example/ Great overview and very simple, concise example of a Java Swing Timer
• Longer practical example http://albertattard.blogspot.com/2008/09/practical-example-of-swing-timer.html Longer, more detailed explanation and example of a Java Swing timer
• Swing vs Util Timers http://www.javapractices.com/topic/TopicAction.do?Id=160 Nice overview, with examples, of Swing vs Util Timers

Java API

• Oracle's JDK 6 FULL Documentation http://http://docs.oracle.com/javase/6/docs/ The FULL Java SE 6 Platform at a Glance! (Old Sun Site: http://java.sun.com/javase/6/docs/index.html)
• Sun's JDK 6 Complete API Specification http://java.sun.com/javase/6/docs/api/index.html The FULL Java API specification for version 6 of the Java Platform, Standard Edition!
• EXCELLENT Visual Reference for JFC (Class Diagrams) http://www.falkhausen.de/en/diagram/html/javax.swing.LabelIconToolTip.html

Javadoc

• Javadoc: Java Documentation Comments http://www.tutorialspoint.com/java/java_documentation.htm A nice overview of Javadoc, the tool and comments
• Javadoc Video on Java Documentation Comments https://www.youtube.com/watch?v=G1cbk3ch7y0 A very nice video overview of Javadoc using Eclipse on Windows

Java vs. Others

• Java for C++ Programmers http://www.javacommerce.com/displaypage.jsp?name=java_for_cplus.sql&id=18260 Java for C++ Programmers
• Java naming conventions for identifiers http://websphere.sys-con.com/node/43489 Java naming conventions for identifiers
• C++ vs. Java http://www.computing.dcu.ie/~renaat/projects/cvjava.html Great page for C++ programmers coming to Java (from Bruce Eckel's Thinking in Java)
• Differences between Java and C++ http://www.lrdev.com/lr/java/javacppdiffs.html Great page describing the differences between Java and C++
• Java vs C++ http://java.sun.com/docs/white/langenv/Simple.doc2.html Great white paper from Oracle on difference between Java and C++
• What's so great about Embedded Java http://www.systronix.com/book/WhyJava.html Great page talking about what kinds of applications Java is good for (and what it's not good for)
• Java and .NET Framework http://www.vbdotnetheaven.com/UploadFile/abanerjee/JavaAndDotNET04082005051058AM/JavaAndDotNET.aspx Very nice little comparison of Java and .NET Framework and whether they can co-exist.
• Comparison of Java and Android API and bases http://en.wikipedia.org/wiki/Comparison_of_Java_and_Android_API Comparison of how Java and Android differ on the backend
• Android (Java) vs iOS development http://techcrunch.com/2013/11/16/the-state-of-the-art/?ncid=fb How the development process differs for both Android, which uses Java, and iOS, which uses Objective-C

Object-Oriented Design and Design Patterns

• Excellent set of videos from lynda.com on OOD https://www.youtube.com/watch?v=eRNCvxPNnck&index=1&list=PLqlI1RpjIS59ziAx7YBqQ0rtyAcpgdsjm lynda.com's great videos on Object-Oriented Design (OOD)
• Excellent set of tutorials on Design Patterns http://www.tutorialspoint.com/design_pattern/ TutorialsPoint's great set of tutorials on Design Patterns
• Excellent set of videos on Design Patterns https://www.youtube.com/watch?v=vNHpsC5ng_E&list=PLY8HMEgt8L3_At0fVJQSZIq49WMuBi-5Q. Derek Banas' great set of videos on Design Patterns

Miscellaneous

• Very simple introduction to methods in Java http://www.video-animation.com/java_011.shtml Very nice (and incredibly basic) introduction to what a method is in Java
• The Power of Polymorphism http://www2.sys-con.com/itsg/virtualcd/java/archives/0508/barnabee/index.html Great little guide on the different kinds of Polymorphism in Java and OO languages
• Excellent, brief, clear summary of callbacks http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Java/Chapter04/interface.html An absolutely wonderful, and clear, description of callbacks in C++ and Java
  • Another very nice summary of callbacks in Java and C++ http://www.xyzws.com/Javafaq/how-to-implement-callback-functions-in-java/157 and why callbacks are useful in C++ http://www.codeguru.com/cpp/cpp/cpp_mfc/callbacks/article.php/c10557/Callback-Functions-Tutorial.htm
• Wonderful guide to questions asked during interviews on Java Programming http://www.developersbook.com/corejava/interview-questions/corejava-interview-questions-faqs.php Wonderful guide to questions asked during interviews on Java Programming, especially on Polymorphism
  • Another nice listing of interview questions for Java: http://www.javatpoint.com/corejava-interview-questions
  • More interview questions on Java Programming with links for more info https://www.udemy.com/blog/java-interview-questions/
  • Top 30 Programming Questions with answers http://javarevisited.blogspot.com/2011/06/top-programming-interview-questions.html
• An interview book on Programming Interviews http://www.amazon.com/Programming-Interviews-Exposed-Secrets-Landing/dp/1118261364 Programming Interviews Exposed
• A wonderful page of helpful Java resources, including learning tutorials and salary expectations http://www.computerscienceonline.org/cutting-edge/java/ Very nice single page of learning and salary resources
• A great video on the history of Java https://www.youtube.com/watch?v=HEdPX8pt_DQ Short 10-minute overview of its origin

C# References

• Online courses/practice problems
  • W3 Schools: https://www.w3schools.com/cs/cs_exercises.php
• Free books
  • C# Notes: https://books.goalkicker.com/CSharpBook/
• Free tutorials/websites
  • W3 Schools: https://www.w3schools.com/cs/index.php
  • Tutorials Teacher: https://www.tutorialsteacher.com/csharp
  • Course + Book: http://www.csharpcourse.com/

Unix/Scripting References

Unix/Scripting References