Understand JVM language

Why there are so many jvm Language ？class Files can achieve language independence , It is not only for Java And it can be compiled from other languages class file .jvm Interpret or compile execution class Files can be platform independent , Can cross platform

NetRexx

Java The pioneer of scripting language in the field ,IBM No open source , Almost extinct .

Jython

( Originally called ‘JPython’) Originally determined to become Python preemption JVM The pioneer of the environment , Its founder Jim Hugunin Was poached by Microsoft , Naturally, he turned his focus to Python And .NET The combination of environment ( This is it. IronPython project )

Groovy

Groovy The initial positioning was JSR( namely Java Specification request ), It is designed to provide developers with a self-service syntax solution , Slow running speed

Scala

Scala The basic grammar of can be used as Java Direct use of substitutes , And more advanced functions can be used to write functional code. The language has a set of built-in Scala library , Those traditional parallel programming problems that have been a headache for developers have been effectively solved here . As for its shortcomings , In addition to some obscure code composition , Compared with other languages in this paper, the compiler it uses is a little weak in processing speed ; In addition, there have been problems in the past that the new version cannot be compatible with the old version .

JRuby And Mirah

The two languages were designed by the same team , Both try to Ruby Language introduction JVM Environmental Science , Language features have also changed . Now Ruby on Rails The framework has been able to run smoothly in JVM In .Ruby And Java Interoperability between environments is excellent , and Ruby Gems And Java The operation of the library can be called concise and efficient , The implementation results are amazing .Mirah And JRuby Basically consistent in function , Only with Ruby Language is less relevant . This enables developers to take Mirah One “JAR file ” Go around the world , Don't bother installing the simulation Ruby A large number of software packages necessary for the environment

Kotlin

Kotlin yes JVM The youngest new member of the family . It is from Groovy And Scala And so on, the elder inherited many excellent genes , At the same time, some original elements are added . Its design idea is to provide the same Java The same quick compilation effect , And get local Java Processing speed of binary content . These two advantages make it from the first release , It has become the first choice for developers to solve the problem of compilation and execution speed JVM Language .

Groovy Of - Powerful , High level , Enterprise friendliness JRuby Of  - Than Ruby better Ruby？Scala- Fast , Multi paradigm programming FANTOM - Java And network plus performance .Jython - JVM Upper Python.Groovy,Scala and kotlin There is extensive tool support .