Question

QUESTION 1: Java Overview Discuss the Java code compilation process. Your discussion must include the tools required, input and output of the tools and the order of execution. You must discuss this process from the perspective of compiling a Java program and its JavaDoc and then running it, all using the command line/console (CMD) (not through an IDE). Total: 10

Answer 1

PLEASE FIND THE ANSWER(S) and EXPLANATION BELOW.

The detailed steps of Java code compilation are given below:-

1. The developer write the source code in java. Let it be Program.java file.
2. Then, in order to run this high-level code, we have to compile it using javac command.
   • javac Program.java
3. After the compilation is successful, we will get the .class file generated. This class file will have the semi-machine code called Byte-Code.
4. Then, we can run the program using java command.
   • java Program
5. Then, it goes through a series of processes inside the JVM(Java Virtual Machine) like:-
   • ClassLoader:- It loads the class
   • ByteCode Verifier: This piece of code verifies if the byte code is correct or not.
   • JIT Compiler: This Just in Time compiler will compile the Byte code to the Native machine code (Binary Code)
6. We can run the code and see the output after these steps.!

Example: In the command line, we can see the steps

praveen_kumar@localhost:-$ vi Program.java praveen_kumar@localhost:~$ cat Program.java public class Program public static void main(String[] args) { System.out.println("Hello World"); بها praveen_kumar@localhost:-$ javac Program.java praveen_kumar@localhost:-$ java Program Hello World praveen_kumar@localhost:-$ 1

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