#23 JDK JRE JVM in Java

[@yashshukla1637]

**#23 JDK, JRE, JVM in Java** - **Introduction & Overview** - Java programming involves concepts like classes, variables, methods, and object relations. - Understanding the *underlying processes* of Java code execution helps relate to new coding concepts. - Compiling Java code requires a tool, specifically the **Java Development Kit (JDK)**. - **JDK** is essential for converting Java code into **bytecode**, the format needed for machine execution. - **JVM (Java Virtual Machine)** - The **JVM** is responsible for running the compiled bytecode on a machine. - It acts as a virtual layer, ensuring Java remains *platform-independent* across machines. - JVM *executes* the bytecode, while the computer translates it into a format it can process. - The *virtual* nature of JVM allows Java code to run consistently across different operating systems. - **JRE (Java Runtime Environment)** - **JRE** provides additional classes and libraries needed to run Java programs, beyond the programmer’s code. - It includes tools for validating bytecode and loading classes as needed for execution. - JRE encompasses the **JVM**, making it a complete environment for running Java applications. - Without JRE, JVM cannot function, as JRE supplies the *runtime* components. - **JDK as the Top Layer** - As developers, installing **JDK** also installs the JRE and JVM, providing the full toolset for both compiling and running code. - On client machines, JRE and JVM might be present alone, sufficient only for running programs. - Software may require specific JRE versions, leading to common prompts for JRE or .NET installations/updates. - **Conclusion**: JDK contains JRE, which contains JVM, each playing a distinct role in Java execution. Further details about JVM will be explored in the next video.

[@bunmisadiq3298]

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

[@shikhar5300]

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

[@freddymintarja2186]

"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?

[@sidarthasingh8158]

@@r_a_t_h_o_d622 no doubt that it went over your head 🤣🤣

[@sidarthasingh8158]

​​@@r_a_t_h_o_d622 no doubt that it went over your head🤣🤣

[@ibu2685]

​@@r_a_t_h_o_d622try to write byte code and run. You will get to know😅

[@sinduraghu5188]

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

[@bhutmaswidi2755]

Mr Telusko is the best!!!!

[@karthikapyla1297]

what a superb explanation. excellent teaching

[@worldofniyathi]

simple but great explanation !

[@somgupta9588]

excellent bro . very simple and easy to understand thanks

[@snehazore7686]

Very Useful

[@letsdrive6606]

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

[@sumukhsonkar4280]

Please provide spring boot live project video, Please start full stack java course...,

[@hanhtayaung8]

Excellent explanation😊

[@lematesfaye-v8i]

good tutorial continue

[@roshnimandarapu5097]

Thanks for all your efforts!

[@teswstlist4717]

helpful....most easy explanation!

[@GirishBalanagu]

Very detailed explanation.Thanks! Can you share the Gear details and track pad related. :)

[@ajaywade9418]

@telusko Please make a video on JVM architecture.

[@pratiktiwariramji]

Yes

[@LifeCodeGame]

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

[@Gulammustafa-dh7pi]

Thank you so much Reddy Sir!

[@NoTimeWaste1]

Thank you, sir.

[@pratikshapatil6148]

Thank you

[@aviralmishra785]

Thankyou sir

[@shaikhsamir3604]

Thanks

[@openedougest4488]

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

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nice videos

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this is helpful..thanks

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Thank you sir 😊

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Rau Way

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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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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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What jdk works best for java db?

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Please take java live session😍

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Next Video -> kzbin.info/www/bejne/lXiuZIqle6t-i6c

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