Why and How is Java Platform Independent?
Java is one of the most used scripting languages for web developers, and its capacity to provide distinctive features has generated a great deal of interest. Despite a syntax resembling C++, Java has a wide range of functions. FITA Academy offers the best Java Training in Chennai, we offer real-time training sessions with live projects.
What Does Platform Independence Mean?
A software or hardware component known as an operating system allows a programme to operate constantly. The Java runtime environment is a platform for this language. When a programme is said to be platform-independent, it means it is not dependent on the computer's operating system.
Compiling a Code
We typically use a programming language with human-readable syntax every time we write code. The list includes some terms, phrase names, variable names, method names, etc. Each of them is regarded as literary works that humans may read.
The source code is thus transformed into machine-readable code, also referred to as machine-level language, by a computer's compiler. The compiler uses a specified format to create machine-level code that the CPU can comprehend and execute correctly.
Code written on one computer cannot run on another computer when the machine-level language is different for each OS unless the OS on both systems is the same. This is viewed as inappropriate by many programmers and developers. Java, on the other hand, streamlines the process and offers a fix.
ClassLoader
It establishes a subsystem connection to the Java Virtual Machine. It loads the.class file, looks for runtime exceptions, and throws a few of them. Following validation, memory is allotted for the present variables and methods; default values are provided for arrays and variables, etc. It also runs any methods or static variables that are present in the code.
The class loader has been specifically created to complete the operation. As a result, when the classes are loaded, the Java runtime does not need to be aware of the file and its settings.
Memory Areas in JVM
Memory Areas in the JVM Class/Method Area
Method, class, and variable names are among the information it keeps. It acts as the collection point for all the the information, variables and methods in a class. It functions as a memory and stores the information required to finish the task. All of the system's threads share it.
Heap
Heap records all the information inserted in its region. It contains a specific amount of information that is unknown until the programme is run. It is utilised all through the show. It is applied to the allocation of dynamic memory. New objects are produced in the heap area.
Language Stack for JVM
When a function is executed, it keeps track of local variables, manages threads actively, and stores the current data in blocks known as frames or stack-frames. FITA Academy offers the best Java courses, we offer real-time training sessions with live projects. Join the Java Online Course and get worthy course Certification with placement assistance.
PC Registration System
There is a storage location for the address of the presently running instruction. When several threads are running, this is advantageous.
Native Methods
It records all of the specifics of the regional methods employed. Unlike Java, it has access to system-specific functions.
Native Method interface
Through this interface, Java connects with programmes written in other languages like C/C++. Programmes can call each other either independently or through the JVM; communication is two-way. Its portability is constrained by the source code's system-specific usage.
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