JVM - Java Virtual Machine
JVM (Java Virtual Machine) is an abstract machine that permits your computer to run a Java program.
It is known as a virtual machine since it doesn't truly exist.
It is a specification that gives a runtime environment during which Java bytecode are often executed.
At the point when you run the Java program, Java compiler initially incorporates your Java code to bytecode. Then, the JVM translates bytecode into native machine language.
It also can run those programs which are written in other languages and compiled to Java bytecode.
Java may be a platform-independent language. It's because once you write Java code, it's ultimately written for JVM but not your computer. Since JVM executes the Java bytecode which is stage free, Java is stage autonomous.
The JVM performs the subsequent main tasks:
JRE - Java Runtime Enviroment
JRE is an acronym for Java Runtime Environment. It's also written as Java RTE.
JRE (Java Runtime Environment) may be a software package that gives Java class libraries, Java Virtual Machine (JVM), and other components that are required to run Java applications.
JRE is that the superset of JVM.
It is the implementation of JVM. It physically exists. It contains a group of libraries + other files that JVM uses at runtime.
Download JRE From here.
JDK - Java Development Kit
JDK is an acronym for Java Development Kit. The Java Development Kit (JDK) may be a software development environment which is employed to develop Java applications and applets.
It physically exists. It contains JRE + development tools.
JDK is an implementation of anybody of the below given Java Platforms released by Oracle Corporation:
Download JDK from here.
JVM (Java Virtual Machine) is an abstract machine that permits your computer to run a Java program.
It is known as a virtual machine since it doesn't truly exist.
It is a specification that gives a runtime environment during which Java bytecode are often executed.
At the point when you run the Java program, Java compiler initially incorporates your Java code to bytecode. Then, the JVM translates bytecode into native machine language.
It also can run those programs which are written in other languages and compiled to Java bytecode.
Java may be a platform-independent language. It's because once you write Java code, it's ultimately written for JVM but not your computer. Since JVM executes the Java bytecode which is stage free, Java is stage autonomous.
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| Working of Java Program |
The JVM performs the subsequent main tasks:
- Loads code
- Verifies code
- Executes code
- Provides runtime environment
JRE - Java Runtime Enviroment
JRE is an acronym for Java Runtime Environment. It's also written as Java RTE.
JRE (Java Runtime Environment) may be a software package that gives Java class libraries, Java Virtual Machine (JVM), and other components that are required to run Java applications.
JRE is that the superset of JVM.
 |
| JAVA Runtime Enviroment |
It is the implementation of JVM. It physically exists. It contains a group of libraries + other files that JVM uses at runtime.
Download JRE From here.
JDK - Java Development Kit
JDK is an acronym for Java Development Kit. The Java Development Kit (JDK) may be a software development environment which is employed to develop Java applications and applets.
 |
| Java Development Kit |
It physically exists. It contains JRE + development tools.
JDK is an implementation of anybody of the below given Java Platforms released by Oracle Corporation:
- Standard Edition Java Platform
- Enterprise Edition Java Platform
- Micro Edition Java Platform
Download JDK from here.
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