#23 JDK JRE JVM in Java

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In this lecture we will learn:
- What is JVM?
- What is JDK?
- What is JRE?
- Importance and uses of JVM, JRE, and JDK.
#1
To compile the Java code, we need a tool and that tool is known as JDK ( Java Development Kit).
- Byte code runs on a machine so we have to convert the java code into the byte code.
- On installing the JDK, we get both updated JRE and JVM.
#2
JVM stands for Java Virtually Machine.
- JVM is the space where you execute the code.
- JVM is used to make the Java language a platform- independent.
- You have to compile the code through JDK and then run the code through JVM.
- JVM is platform dependent and it needs to be built for a particular OS.
- JVM is platform-dependent.
#3
JRE stands for Java Runtime Environment.
- JRE contains all the in-built classes and other extra files and libraries that we can use in our code.
- JRE validates the byte code.
- JRE loads a class.
- If you use extra libraries, and you also need an environment. An additional layer is present above the OS known as JRE.
#4
- JVM is a part of JRE. JRE includes JVM and libraries.
JVM - Java Virutal Machine
JRE - Java Runtime Environment
- For development purposes, you need to install JDK (Java Development Kit) which consists of JRE and JVM.
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"You can't type in bytecode, I mean...you can, don't try it" had me dying 😂

[@r_a_t_h_o_d622]

What was funny in this?

[@freddymintarja2186]

@@r_a_t_h_o_d622 can you type in byte code?

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This is the best java lesson I had ever listen to. Good job!

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Java learning journey is going great with your videos. Respect ++

[@worldofniyathi]

simple but great explanation !

[@sinduraghu5188]

Thanks a lot... You are unique combination of understanding code and teaching it

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helpful....most easy explanation!

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very useful video to understand jvm, JRE, JDK, Bytecode

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very simple and easy to understand
thanks

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[@GirishBalanagu]

Very detailed explanation.Thanks!
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[@saumyojitdas4212]

After compilation .class file is created .
When .class file will be created in /lib/Ext . (extension class path)
Mainly it is there in application Class path .
At what point .class file is created in Hdd at the time of Loading or Linking after bytecode Verification?

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Excellent explanation😊

[@AmitSingh-xc9qe]

Thank you sir 😊

[@TheMESCuS]

5:19 you said
In the next video we’ll try to expand more on jvm
I’m sorry to say that I couldn’t found next video
Would you pls help me
Thanks

[@shivamsingh7009]

ua-cam.com/video/_GK3WoFFKUE/v-deo.html

[@NoTimeWaste1]

Thank you, sir.

[@LifeCodeGame]

Great explanation of JDK, JRE and JVM in Java! Keep up the awesome work!

[@aviralmishra785]

Thankyou sir

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In my laptop there is no JRE I want to paste jar file of MySQL to connectivity but there is no jre how can I connect database to jdbs driver

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Thanks

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Thank you

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this is helpful..thanks

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How do I update my JDK?

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