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Nashorn

Nashorn

Java source name pattern checker with a nashorn script

Ken Fogel recently tweeted:a,b,c,d,e,f,g,h,I,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y & z are not identifiers. IDE should show an error when an identifier is less than 3...

Ken Fogel recently tweeted:a,b,c,d,e,f,g,h,I,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y & z are not identifiers. IDE should show an error when an identifier is less than 3 char.While I don't have any IDE solution here, the following Nashorn script may be customized to check class, method and variable name patterns in Java sources. This script uses Javac Tree API to parse java sources. Then it uses a TreeScanner subclass in script to call checkXYZ methods to check class, method...

Nashorn

Mixing #es6 arrows and #java lambdas with #nashorn in #java9

Mixing ES6 arrows and...

Mixing ES6 arrows and Java Lambdashttps://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Functions/Arrow_functionshttps://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html

Nashorn

Extracting a single .class file from java9 platform jimage modules file

We can use java FileSystem API from Nashorn JavaScript to extract a single .class file from java9 platform jimage modules file.The following simple Nashorn...

We can use java FileSystem API from Nashorn JavaScript to extract a single .class file from java9 platform jimage modules file.The following simple Nashorn script extracts .class of the given class name:File: jextract.js// This script extracts .class for a single class// from the platform jimage ($JDK9/lib/modules) file.// Specify module/class like java.base/java.util.Vectorif (arguments.length == 0) { print("Usage: jjs jextract -- <module>/<classname>") exit(1)}// Java types...

Nashorn

Printing parse trees using nashorn directive prologues

ECMAScript specification allows for "directive prologues" (http://www.ecma-international.org/ecma-262/5.1/#sec-14.1). A directive prologue in an instruction to...

ECMAScript specification allows for "directive prologues" (http://www.ecma-international.org/ecma-262/5.1/#sec-14.1). A directive prologue in an instruction to the ECMAScript engine. Apart from the standard specified "use strict" directive (which makes the particular program or function "strict"), ECMAScript specification allows implementation defined directive prologues as well.Implementations may define implementation specific meanings for ExpressionStatement productions...

Nashorn

Remote debugging of nashorn scripts with NetBeans IDE using "debugger" statements

You can debug nashorn scripts - even if you do not create any NetBeans project or even open the JavaScript files in NetBeans! You just need to connect NetBeans...

You can debug nashorn scripts - even if you do not create any NetBeans project or even open the JavaScript files in NetBeans! You just need to connect NetBeans debugger to a remote Java process that evaluates Nashorn scripts! You can use ECMAScript debugger statements to stop the script execution at the places of interest. Start the process running your script with debugger agentI'm using "jjs" tool to run a sample script - but you may use any java application that evaluates...

Nashorn

Nashorn js extension for NetLogo - implementing NetLogo commands, reporters in scripts!

Earlier I blogged about playing with NetLogo using Nashorn. NetLogo, as you'd recall, is a multi-agent programmable modeling environment for the Java platform....

Earlier I blogged about playing with NetLogo using Nashorn. NetLogo, as you'd recall, is a multi-agent programmable modeling environment for the Java platform. In addition to supporting NetLogo programming language, NetLogo supports extensions written in JVM languages such as Java, Scala. To write extensions, NetLogo supports an Extensions API. Writing a NetLogo extension in Java or Scala or any compiled JVM language means that you've to compile and make a jar to extend...

Nashorn

Fun with NetLogo using Nashorn JavaScript engine

NetLogo is a multi-agent programmable modeling environment running for the Java platform. In addition to being a GUI program to edit and run NetLogo models,...

NetLogo is a multi-agent programmable modeling environment running for the Java platform. In addition to being a GUI program to edit and run NetLogo models, NetLogo supports Controlling API so that NetLogo can be invoked and controlled by a program running on JVM. The "controlling api" supports both GUI and 'headless' mode.I used Nashorn javascript engine to use NetLogo "controlling API" from a script. I ran the bundled Maxwell's demon model in "headless mode" using the...

Nashorn

Playing with Nerdamer symbolic math JS library with Nashorn jjs

I was searching for a self-contained, simple JS library for symbolic math to check homework solutions of my son. On googling "symbolic math javascript", the...

I was searching for a self-contained, simple JS library for symbolic math to check homework solutions of my son. On googling "symbolic math javascript", the first hit I got was http://www.nerdamer.com/I git cloned the source from the git repo:$ cd ~/src$ git clone https://github.com/jiggzson/nerdamer$ cd nerdamerThere is a nice documentation for nerdamer @ http://www.nerdamer.com/documentation I started Nashorn jjs shell. The following is from my jjs session with nerdamer.$...