Android Tutorial Java-Basic Java(Part-2) | Edureka

Veröffentlicht am: 22 Oktober 2012
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This android tutorial talks about Basic Java in detail:

What is Java, JRE, JDK?
What is Java Virtual Machine(JVM)?
Explained beautifully by Amit using Paint.
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Java :
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Java is a object oriented programming language and computing platform released by Sun Microsystems in 1995. Java is designed beautifully, so code that runs on one platform does not need to be recompiled to run on another. It let application developers to write only once and run anywhere.

JRE :
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Java Runtime or Java Runtime Environment (JRE), is included in Java Development Kit (JDK), a set of programming tools that help developers in creating Java applications. It consists of the Java Virtual Machine (JVM), core classes, and supporting files.

JDK :
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JDK (Java development kit) provides all the needed support for software development in Java which includes :

** javac -- the Java compiler, which converts source code into Java bytecode
** javadoc -- the documentation generator, which automatically generates documentation from source code comments
** jar -- the archiver, which packages related class libraries into a single JAR file. This tool also helps manage JAR files.

** jdb, appletviewer and much more.

JVM :
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A Java virtual machine (JVM) is a virtual machine that can execute Java bytecode.

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