JVM (Java) and it’s Memory Management

JVM (Java Virtual Machine) is an abstract machine or can say it is a software implementation of a Physical Machine. It is a specification that provides runtime environment in which java bytecode can be executed. JVMs are available for many hardware and software platforms (i.e. JVM is platform dependent). What is JVM It is: A specification: Where working of Java Virtual Machine is specified. But implementation provider is independent to choose the algorithm. Its implementation has been provided by Oracle and other companies. An implementation: Its implementation is known as JRE (Java Runtime Environment). Runtime Instance: Whenever you write java command on the command prompt to run the java class, an instance of JVM is created. What it does The JVM performs following operation: Loads code Verifies code Executes code Provides runtime environment JVM provides definitions for the: Memory area Class file format Register set Garbage-collected heap Fatal error reporting… Read more“JVM (Java) and it’s Memory Management”

Core Java Architecture and JVM

In this lesson, we are going to explain the core Java Architecture. Java Java was conceived by a team of engineers in Sun Microsystems in 1991 as a part of a research project, which was led by James Gosling and Patrick Naughton. It was initially called Oak but was renamed as Java in 1995. This is designed to be small, simple, and portable across platforms and operating systems, both at the source and at the binary level, which means that the same Java program can run on any machine. Features of Java Java is an Object Oriented Language. Object-Oriented design is a technique that helps the programmer visualize the program using real-life objects. Java is a Simple Language. The reason is, Certain complex features like operator overloading, multiple inheritance, pointers, explicit memory de allocation are not present in Java language. Using Java we can write Robust Programs. The Two main… Read more“Core Java Architecture and JVM”