What is the extension of compiled Java classes

What is the extension of compiled Java classes

I'm happy to respond in English!

The compiled Java classes have a .class extension. When you compile your Java source code using the javac compiler, it produces a set of bytecode files with the .class extension.

For example, if you have a Java file named HelloWorld.java, after compiling it, you'll get a HelloWorld.class file in the same directory. The .class file contains the compiled bytecode that can be executed by the Java Virtual Machine (JVM).

The .class files are platform-independent, meaning they can run on any device that has a JVM installed, without requiring recompilation. This is one of the key benefits of Java's "write once, run anywhere" philosophy.

It's worth noting that when you compile a Java file with multiple classes or interfaces, it produces multiple .class files, each containing the compiled bytecode for a specific class or interface.

When you package these compiled classes into a JAR (Java Archive) file using the jar tool, the resulting JAR file contains the compiled bytecode files along with other resources like images, sounds, and configuration files. The JAR file has a .jar extension.

Later on, when you need to run your Java program, you can use the java command-line tool to load the .class or .jar files into the JVM, which then executes the bytecode instructions contained within.

What is the extension of Java code files MCQ

I'm happy to help you with that!

The extension for Java code files is .java. Yes, you read that right - .java!

Now, let me explain why it's .java and not something like .script or .program (although those would be nice names ).

Java was created by Sun Microsystems (now owned by Oracle) in the early 1990s. The language was designed to be platform-independent, meaning that programs written in Java could run on multiple operating systems without modification.

The first version of the Java Development Kit (JDK), which included the java compiler and runtime environment, was released in 1995. Since then, Java has become one of the most popular programming languages in the world!

So, when you write a program or script in Java, it's natural to use a file extension that reflects the language's name. Voilà! .java is born .

Now, let's answer some multiple-choice questions (MCQs) related to this topic :

Question 1: What is the primary file extension for Java code files?

A) .script

B) .program

C) .java

D) .lang

Answer: C) .java

Question 2: Which company developed the Java programming language?

A) Microsoft

B) Oracle (formerly Sun Microsystems)

C) IBM

D) Google

Answer: B) Oracle (formerly Sun Microsystems)

Question 3: What is the primary purpose of the .java file extension?

A) To compile Java code

B) To run Java programs

C) To save Java source code

D) To execute Java scripts

Answer: C) To save Java source code

That's it! I hope you enjoyed this brief history and Q&A session .