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1. Top results related to what is the difference between c# & java programming

   • What is the difference between Java and C# when it comes to connect to Sql Server Database?

     Top Answer

     Answered Jun 30, 2011 · 3 votes

     Check how your .NET app is connecting. It may be as simple as it using named pipes, which JTDS supports as well.

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     1/5

   • What is the difference between an int and an Integer in Java and C#?

     Top Answer

     Answered Mar 18, 2020 · 252 votes

     In Java, the 'int' type is a primitive, whereas the 'Integer' type is an object.

     In C#, the 'int' type is the same as System.Int32 and is a value type (ie more like the java 'int'). An integer (just like any other value types) can be boxed ("wrapped") into an object.

     The differences between objects and primitives are somewhat beyond the scope of this question, but to summarize:

     Objects provide facilities for polymorphism, are passed by reference (or more accurately have references passed by value), and are allocated from the heap. Conversely, primitives are immutable types that are passed by value and are often allocated from the stack.

     Other Answers

     Answered Dec 23, 2022 · 153 votes

     Well, in Java an int is a primitive while an Integer is an Object. Meaning, if you made a new Integer:

     Integer i = new Integer(6);-

     You could call some method on i:

     String s = i.toString();//sets s the string representation of i-

     Whereas with an int:

     int i = 6;-

     You cannot call any methods on it, because it is simply a primitive. So:

     String s = i.toString();//will not work!!!-

     would produce an error, because int is not an object.

     int is one of the few primitives in Java (along with char and some others). I'm not 100% sure, but I'm thinking that the Integer object more or less just has an int property and a whole bunch of methods to interact with that property (like the toString() method for example). So Integer is a fancy way to work with an int (Just as perhaps String is a fancy way to work with a group of chars).

     I know that Java isn't C, but since I've never programmed in C this is the closest I could come to the answer.

     Integer object javadoc

     Integer Ojbect vs. int primitive comparison

     Other Answers

     Answered Mar 18, 2020 · 41 votes

     I'll add to the excellent answers given above, and talk about boxing and unboxing, and how this applies to Java (although C# has it too). I'll use just Java terminology because I am more au fait with that.

     As the answers mentioned, int is just a number (called the unboxed type), whereas Integer is an object (which contains the number, hence a boxed type). In Java terms, that means (apart from not being able to call methods on int), you cannot store int or other non-object types in collections (List, Map, etc.). In order to store them, you must first box them up in its corresponding boxed type.

     Java 5 onwards have something called auto-boxing and auto-unboxing which allow the boxing/unboxing to be done behind the scenes. Compare and contrast: Java 5 version:

     Deque<Integer> queue;-void add(int n) { queue.add(n);}-int remove() { return queue.remove();}-

     Java 1.4 or earlier (no generics either):

     Deque queue;-void add(int n) { queue.add(Integer.valueOf(n));}-int remove() { return ((Integer) queue.remove()).intValue();}-

     It must be noted that despite the brevity in the Java 5 version, both versions generate identical bytecode. Thus, although auto-boxing and auto-unboxing are very convenient because you write less code, these operations do happens behind the scenes, with the same runtime costs, so you still have to be aware of their existence.

     Hope this helps!

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     2/5

   • What is the difference between J# and C#

     Top Answer

     Answered Jul 06, 2011 · 10 votes

     C# is MS's ECMA standard langauge that borrows heavily from C/C++/Java (and a couple of concepts from Delphi).

     J# is essentially a version of J++ for the .NET platform. It accepts the Java-esque language that J++ did but produces .NET code rather than Java bytecodes.

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     3/5

   • What is the difference between covariance and contra-variance in programming languages?

     Top Answer

     Answered Jun 20, 2020 · 35 votes

     Covariance is pretty simple and best thought of from the perspective of some collection class List. We can parameterize the List class with some type parameter T. That is, our list contains elements of type T for some T. List would be covariant if

     S is a subtype of T iff List[S] is a subtype of List[T]

     (Where I'm using the mathematical definition iff to mean if and only if.)

     That is, a List[Apple] is a List[Fruit]. If there is some routine which accepts a List[Fruit] as a parameter, and I have a List[Apple], then I can pass this in as a valid parameter.

     def something(l: List[Fruit]) { l.add(new Pear())}-

     If our collection class List is mutable, then covariance makes no sense because we might assume that our routine could add some other fruit (which was not an apple) as above. Hence we should only like immutable collection classes to be covariant!

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     4/5

   • What's the difference of the usage of volatile between C/C++ and C#/Java?

     Top Answer

     Answered Nov 12, 2013 · 20 votes

     For C#/Java, "volatile" tells the compiler that the value of a variable must never be cached as its value may change outside of the scope of the program itself. The compiler will then avoid any optimisations that may result in problems if the variable changes "outside of its control".

     In C/C++, "volatile" is needed when developing embedded systems or device drivers, where you need to read or write a memory-mapped hardware device. The contents of a particular device register could change at any time, so you need the "volatile" keyword to ensure that such accesses aren't optimised away by the compiler.

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     5/5

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2. www.educative.io › blog › c-sharp-vs-javaWhat are the differences between C# and Java? - Educative

   www.educative.io › blog › c-sharp-vs-java

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   Jan 13, 2022 · Start Learning for Free. In this article, we’ll be comparing the merits of two popular programming languages side-by-side: C# and Java. At their core, C# (pronounced see sharp) and Java are both robust, high-level, object-oriented programming languages with more similarities than differences.

3. www.coursera.org › articles › c-vs-javaC# vs. Java: Which to Choose? | Coursera

   www.coursera.org › articles › c-vs-java

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   • What Is C#?
   • C# Use Cases
   • What Is Java?
   • Java Use Cases
   • How to Learn C# and Java
   • Start Learning Today with Coursera

   C# is an object-oriented programming language designed for maximum reusable code.The intent of C# is to be a simple, general-purpose programming language receiving regular updates every few years to remain competitive with industry standards. As of September 2023, the current version of C# is 12.0 .

   See full list on coursera.org

   Microsoft created C#, so it can be used to make native Windows applications. It has a robust community you can draw from and first-class features and functionalities on the Windows operating system (OS). C# is a general-purpose programming language, making it an ideal choice for a wide range of projects. It’s commonly used to create dynamic website...

   See full list on coursera.org

   Java is a multi-platform, object-oriented programming language. It is very popular for creating both client and server-side applications. Its syntax is similar to C and C++, but is easier to understand. It also has fewer low-level features since that functionality is handled automatically by the compiler and Java Virtual Machine.

   See full list on coursera.org

   The versatility of Java means it can be used to create almost anything. It can make desktop applications, mobile applications, games, website backends, and servers, and can even run machines. Wikipedia uses Java for its article search, and most stock trading platforms were created with it, as well. Alphabet, Meta, Twitter, and just about any big te...

   See full list on coursera.org

   Thanks to technology today, there are many different options for learning C# or Java online. One option is to self-learn by using blogs, articles, Youtube videos, etc. It’s important to remember that you can spend all day studying the language, but the best way to learn to code is to dive in and start building. You may consider taking an online Gui...

   See full list on coursera.org

   If you're unsure of which programming language to learn, online courses on Coursera can be a great way to determine which language fits your needs. Learn about the different programming fundamentals and how to apply them to real-life scenarios all at your own pace. Check out beginner-friendly courses like Introduction to C# Programming and Unity fr...

   See full list on coursera.org

4. People also ask

   What is the difference between C# & Java?

   • At their core, C# (pronounced see sharp) and Java are both robust, high-level, object-oriented programming languages with more similarities than differences. One significant advantage to learning either language is that their fundamental similarities make it relatively easy to learn one language after mastering the other.

   What are the differences between C# and Java? - Educative

   www.educative.io/blog/c-sharp-vs-java

   See all results for this question

   Which programming language is better C# or Java?

   • Join 2M+ developers learning in-demand programming skills. In this article, we’ll be comparing the merits of two popular programming languages side-by-side: C# and Java. At their core, C# (pronounced see sharp) and Java are both robust, high-level, object-oriented programming languages with more similarities than differences.

   What are the differences between C# and Java? - Educative

   www.educative.io/blog/c-sharp-vs-java

   See all results for this question

   Why is Java a good programming language?

   • Java is a multi-platform, object-oriented programming language. It is very popular for creating both client and server-side applications. Its syntax is similar to C and C++, but is easier to understand. It also has fewer low-level features since that functionality is handled automatically by the compiler and Java Virtual Machine. Built-in security.

   C# vs. Java: Which to Choose? | Coursera

   www.coursera.org/articles/c-vs-java

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   Is Java more platform-independent than C#?

   • However, with .NET Core, C# developers can create applications that are not dependent on the Windows operating system. Overall, while Java is more platform-independent than C#, both languages can be used to create cross-platform applications.

   C# vs Java: A Comprehensive Comparison – .NET Core Tutorials

   dotnetcoretutorials.com/c-vs-java/

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5. www.geeksforgeeks.org › java-vs-c-sharpJava vs C# - GeeksforGeeks

   www.geeksforgeeks.org › java-vs-c-sharp

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   Apr 1, 2024 · Java is a general-purpose computer programming language that is concurrent, class-based, object-oriented, etc. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of computer architecture. Below are some major differences between C# and Java: platform-independent APIs

   Feature	C#	Java
   Operator Overloading	C# supports operator overloading for ...	Java does not support operator ...
   Runtime Environment	C# supports CLR(Common Language Runtime).	Java supports JVM(Java Virtual Machine).
   API Control	C# APIs are controlled by an open-source ...	Java APIs are also controlled by open ...
   Public Classes	In C#, there can be many public classes ...	In Java there can be only one public ...

   See full list on geeksforgeeks.org

   • Video Duration: 60 min

6. www.guru99.com › java-vs-c-sharp-key-differenceJava vs C# – Difference Between Them - Guru99

   www.guru99.com › java-vs-c-sharp-key-difference

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   Mar 16, 2024 · Key Difference Between Java and C# Java runs on the Java Runtime Environment (JRE) whereas C# is designed to be run on the Common Language Runtime (CLR). Java is a class-based Object Oriented language whereas C# is Object-Oriented, functional, strong typing, component-oriented.

7. hackr.io › blog › c-sharp-vs-javaC# vs. Java: Which Language is Better to Learn? - Hackr

   hackr.io › blog › c-sharp-vs-java

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   Java doesn’t support features like operator overloading and pointers, whereas C# does. Both C# and Java are high-level, general-purpose, object-oriented languages with strong communities. Let’s dive into a deeper comparison. First thing’s first: What is C#?

8. www.coursera.org › in › articlesC# vs. Java: Which to Choose? | Coursera

   www.coursera.org › in › articles

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   Mar 22, 2024 · C# is an object-oriented and component-oriented programming language designed for maximum code reusability. Developed in 2000, C# intends to be simple, general-purpose, and modern, receiving regular updates every few years to remain competitive with industry standards. As of March 2023, the current version of C# is 11 [ 2 ].

9. dotnetcoretutorials.com › c-vs-javaC# vs Java: A Comprehensive Comparison – .NET Core Tutorials

   dotnetcoretutorials.com › c-vs-java

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   One of the main differences between C# and Java is the platform they run on. C# was originally designed to run on Windows, while Java can run on any operating system. However, Microsoft has since created .NET Core, which allows C# to be used on Linux as well.