• Automatically exported from code.google.com/p/jerl on April 9th, 2015
• Latest port was Perl 5.18.2
• Time, funding, and interest have resulted in no further ports.

#summary JERL quick overview (Perl + JAVA)

= Introduction = Jerl allows perl to run within the JVM (not having to access any external libs).

= Details = Jerl allows perl to run within the JVM (not having to access any external libs). Perl has been virtualized to run within the JVM. The current implementation is a version of microperl.

= How To Run =

== Run from the jerl jar ==

Run the following test perl programs from the command prompt

*converge on constant PHI via the fibbonacci sequence java -jar ./jars/jerl.jar ./perl/fib.pl

*count up to infinity by pushing large numbers onto a perl array, and see how far it can go java -jar ./jars/jerl.jar ./perl/infloop.pl

== Run jerl within Java ==

Run the following from the command prompt

*cd java (goto the java example directory)

*javac -classpath ../jars/jerl.jar testJerlVMCall.java;

*java -classpath ../jars/jerl.jar:. testJerlVMCall

== Work with jerlSampleProject within Eclipse ==

• unzip the sample jerl Eclipse project in your Eclipse workspace

• Import project

  ** in the menu select file -> import

  ** select existing project

  ** input path of jerlEclipseSampleProject

• select helloWorld.java in jerlEclipseSampleProject

• run helloWorld.java as a java application

Jerl Version Perl Versions Supported JERL Release Number Notes Jerl 5.18r9.1 5.18.2 custom microperl 9.1 fixed Issue#21 Jerl 5.18r9 5.18.2 custom microperl 9 Jerl 5.18r8 5.18.1 custom microperl 8 Jerl 5.18r7 5.18 custom microperl 7 Jerl 5.16.3r6 5.16.3 custom microperl 6 Jerl 5.16.2r5 5.16.2 custom microperl 5 Jerl 5.16.1r4 5.16.1 custom microperl 4 Jerl 5.16r3 5.16 custom microperl 3 Initial Release Jerlr2 5.14.2 custom microperl 2 Initial Release Jerlr1 5.14 custom microperl 1

= Why JERL =

= How do I run perl on Windows? =

• Free: Strawberry Perl (perl5) - http://strawberryperl.com/
• Active State Perl: http://www.activestate.com/activeperl
• (FYI: This question comes up a lot because I don't develop on Windows and cannot fix bux there)

= What other projects have PERL running in the JVM =

• Perl6 via a JAR : Rakudo Perl (perl6)- http://rakudo.org/

= Why is JERL running under nestedVM / MIPS =

• nestedVM provided a straightforward means of recompilation
• MIPS running within Java is not fast, but there are alternatives for Perl Java integration if speed is a concern(see below)
• Implement project in a maintainable way so updates are not too time consuming

= Isn't there something like this already =

• For speed / optimization Inline::Java works
• Check CPAN.org, search Java (there may be something similar)
• Goto Perlmonks.org, search Java (there may be something similar)

= Jerl Alternatives (TIMTOWTDI) =

• Perl's interface to JAVA Inline::Java
• --> http://search.cpan.org/search?mode=module&query=Inline::Java
• JPL: A deprecated means of accessing JAVA & Perl
• --> http://search.cpan.org/~gmpassos/PLJava-0.04/README.pod

= What Jars are required for JERL=

• jerl.jar is required for jerl
• jerl_perlVM.jar is a wapper for interfacing with jerl via Java
• you may find both in the eclipse sample project