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Many people are asking about polymorphism.
polymorphism is an OOP concept that is not related to a specefic programming language.
It is divided into two types: static and dynamic polymorphism
I suggest to take alook at the polymorphism in java tutorial to learn more about this important concept.

Thank you for the great training.
It seems interesting.
I suggest those java interview questions for beginners:

it helped me to get hired.

There is a difference between casting and conversion.
In your case you need conversion.
I recommend also this website to learn java casting.

I think that you have a casting issue.
I recommend also this website to learn about casting in java.

The cast is a way to say to the compiler: i know what i do trust me i am an engineer.
this casting in java tutorial explains this concept very well.

Converting a data type to another one is called casting.
I suggest to take a look at this casting in java course to understand better the concept.

I want to share with the other members of the forum the best core java tutorial that i have found on the net.
Each core JAVA Tutorial explains a set of JAVA concepts and gives a lot of examples and code snippets to all these JAVA concepts.
By going through each core JAVA Tutorial in the right order, you learn the core JAVA concepts and you will be able to dive into the JAVA world.
This tutorial is composed by these tutorials:

Lesson 1: Install the necessary tools

Lesson 2: JAVA variables for beginners

Lesson 3:Flow control statements in JAVA

Lesson 4:Looping statements in JAVA

Lesson 5: Reading input from the console

Lesson 6: JAVA Array Declaration, initialization and loop through

Lesson 7: JAVA Class Tutorial For Beginners

Lesson 8: JAVA Objects Tutorial For Beginners

Lesson 9: JAVA Constructor Tutorial For Beginners

Lesson 10: Method overloading in JAVA Tutorial For Beginners

Lesson 11: Inheritance in JAVA Tutorial For Beginners

I recommend the core java tutorial of the how to program in java website.

I suggest that you take a look at a good java tutorial to get the basics of the language before starting the project.
I suggest this core java tutorial to start with.

I find this core java tutorial very useful.
It contains a good java class tutorial, a very useful java objects tutorial and also a good java constructor tutorial.

I recommend the java variables for beginners tutorial to learn how to use java variables.

You can check this core java tutorial for free:
http://how-to-program-in-java.com/core-java-tutorial/

I suggest to take a look at this core java tutorial:
http://how-to-program-in-java.com/core-java-tutorial/
It contains good posts.

Your training is interesting but it is paid.
But, i want to suggest a free core java tutorial which seems interesting:
http://how-to-program-in-java.com/core-java-tutorial/

I suggest this core java tutorial: http://how-to-program-in-java.com/core-java-tutorial
It is still under construction. But, it contains very interesting core java tutorials.

In order to install the right version of Code::Blocks for C/C++ development, please check this tutorial:
http://know-how-tutorials..com/2015/05/how-to-download-right-version-of.html

And for more tutorials check this blog: http://know-how-tutorials..com

Yes you can earn money with .

For basic knowledge take a look at this tutorial:

http://know-how-tutorials..com/2015/05/how-to-earn-money-using-adfly-without.html

And to multiply your earning with take a look at this link:

http://know-how-tutorials..com/2015/06/how-you-multiply-your-earnings-with.html

And for more tutorials and tips, please check this link: http://know-how-tutorials..com