What is the difference between JDK, JRE, and JVM?

Java Virtual Machine (JVM) is an abstraction layer between a Java application and the underlying platform. it is acts as a “virtual” machine, to the bytecodes comprising the program.

JRE stands for Java Runtime Environment,which provides run time enviorment to run java applications. It is the combination of JVM and set of libraries to which will be used to run application.

JDK stands for Java Development Kit. It is a software development environment, used to develop Java applications and applets. It contains JRE(Java Runtime Environment) and development tools to develop applications.

Java Concepts •  Added 10 months ago

why is string is immutable in java?

* In Java, string objects are immutable in nature which simply means once the String object is created its state cannot be modified. * Whenever you ...


What is the difference between this() and super() in Java?

In Java, super() and this(), both are special keywords that are used to call the constructor. __this:__ 1. this() represents the current instan ...


What is the difference between equals() and == in Java?

* __Equals()__ method is defined in Object class in Java and used for checking equality of two objects defined by business logic. * __''==''__ or dou ...


What is final keyword in Java?

__final__ is a special keyword in Java that is used as a non-access modifier. A final variable can be used in different contexts such as final variabl ...


What is the difference between a local variable and an instance variable?

__Local Variable:__ a local variable is typically used inside a method, constructor, or a block and has only local scope. Thus, this variable can be ...


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