With the last update of ImageJ 1.51r, it is possible to use Java 9 and its new JavaScript engine Nashorn with ECMAScript 6 functionalities.... and that's a great news!! See how to do that...
1. Configuration of JVM
Go to the Oracle Java Downloads page [Link], click on the Download button of the JRE — Java Runtime Environment — and select the file corresponding to your Operating System and your architecture (64-bit).2. Configuration of ImageJ
Note: This section only describes the procedure for Linux computers.
In your ImageJ folder, there is a file named
run
, open it with your favourite text editor, then modify the line beginning with "java..." by:mypath/where/is/jre9/bin/java -Dnashorn.args=--language=es6 -Xmx2048m -cp ij.jar ij.ImageJ
First, you have to give the path of java9,
mypath/where/is/jre9/bin/java
... then for activating ECMAScript 6 for Java, you must add the option:
-Dnashorn.args=--language=es6
Finally, you could allocate more memory with the option -Xmx (expressed in bytes):
-Xmx2048m
3. Check versions
Now, runImageJ
with the modified script run
and look at the Plugins>Utilities>ImageJ Properties
[cf: previous post] to see if you have java9.x as java.version.Morever,we have to check the JavaScript version..., go to
Plugins>New> JavaScript
, and paste the following lines...let i=3; IJ.log(`${i}`); const foo = x => x+3; IJ.log(foo(4));
Run this script (
Ctrl
+ R
).If you see in the
Log
window, the numbers 3
and 7
. Congratulations!!, you have access to ECMAScript 6 (or ES6 or ES2015) functionalities ... and that's a really great news. I will explain this in the next posts...Thank you for reading...
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