Why JVM will outlive java?
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Why JVM will outlive Java? Hardware Architecture Java Application JVM Operation System Ram Lakshmanan www.linkedin.com/in/ramlakshman/
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Transcript of Why JVM will outlive java?
Why JVM will outlive Java?
Hardware Architecture
Java Application
JVM
Operation System
Ram Lakshmanan
www.linkedin.com/in/ramlakshman/
What is Java? What is JVM?
• Java – programming language
• JVM - Translates the Java program into instructions and commands that run on the local operating system.
Hardware Architecture
Java Application
JVM
Operation System
Java & JVM
A.java Java Compiler(javac)
A.class (OS specific) JVM
Build Time Run Time
Write Once, Run Anywhere – Promise
Hardware Architecture x
Java Application
(OS-1) JVM
Operation System 1
Hardware Architecture y
Java Application
(OS-n) JVM
Operation System n
Just because of JVM
Ready for a Surprise?
• JVM knows nothing of the Java programming language
• It just knows of a particular binary format, the class file format.
Hardware Architecture
Java Application
JVM
Operation System
As long as you pass specified class format, JVM can execute it.
A.java Java Compiler(javac)
A.class (OS specific) JVM
A.scala Scala Compiler(scalac)
A.xyz XYZ Compiler
Languages that run on JVM
clojure
Language Java implementations
Ada JGNAT
BBx BBj is a superset of BBx, PRO/5, and Visual PRO/5.
C C to Java Virtual Machine compilers[2]
CFML
Adobe ColdFusion
Railo
Open BlueDragon
Common LispArmed Bear Common Lisp[3]
CLforJava
JavaScriptRhino
Nashorn
Pascal
Free Pascal
MIDletPascal
Oxygene
Perl 6 Rakudo Perl 6
PrologJIProlog
TuProlog
Python Jython
REXX NetRexx
Ruby JRuby
Scheme
Bigloo
Kawa
SISC
JScheme
Tcl Jacl
New languages with JVM implementations
Ateji PX
BBj
BeanShell
Ceylon
CFML
CAL
E
Fantom
Flow Java
Fortress
Frege
Frink
Gosu
Ioke
Jelly
Join JavaJoy
Judoscript
Kotlin
Mirah
NetLogoNice
Noop
Pizza
Pnuts
Processing
X10
Xtend
Popular Languages
and50+ languages
Why JVM will outlive Java?
• Java lost it’s primary focus - SimplicityoBut for GC and pointers, Java more or less has same amount of complexity
that C/C++ used to have.
• Not widely used in new developments (especially in startups). But strong contender in Enterprise world.
Job Trends – last 8 years
Other JVM languages eatingJava’s share
Note the decline
JVM – Universe’s most stable/Robust Execution Environment!
Opportunity to you!
• If you are a JVM Engineer. It doesn’t matter • What Language – Java, Scala, Groovy, Jruby, Clojure ….
• What Server – Tomcat, Resin, Jboss, Webshphere
• What Framework – Spring, Apache, Guava….
• You are going to be invaluable. You can • isolate performance bottlenecks
• keep production highly available – 99.999%
• Scale the Platform
10 million Java Developers. <3% know about JVM
JVM Engineers – Super Stars of Organization
Thank you!
• To learn more about JVM visit my blog: http://tier1app.com/
