Exception while using ES6 features (template strings) with Nashorn on JDK 9

[Mohammed Sanaulla]

Thanks a lot for the solution. It worked. But what is the standard way to
execute ES6 Javascript in Java 9? Is there some documentation for it? Also
I am looking for some documentation on internal workings of Nashorn script
execution engine.

Regards,
Sanaulla

Mohamed Sanaulla <http://blog.sanaulla.info> |
http://in.linkedin.com/in/mohamedsanaulla

On 26 April 2017 at 17:12, Hannes Wallnöfer <hannes.wallnoefer at oracle.com>
wrote:

> Hi Mohammed,
>
> as Jim noted you have to enable ES6 features using the —language=es6
> option. The official Script API does not support engine options, but you
> can use the Nashorn API:
>
> import javax.script.ScriptEngine;
> import jdk.nashorn.api.scripting.NashornScriptEngineFactory;
>
> NashornScriptEngineFactory factory = new NashornScriptEngineFactory();
> ScriptEngine engine = factory.getScriptEngine("--language=es6");
>
> Hannes
>
>
> > Am 26.04.2017 um 16:00 schrieb Jim Laskey (Oracle) <
> james.laskey at oracle.com>:
> >
> > You need to specify --language=es6 on the command line
> >
> >> On Apr 26, 2017, at 10:25 AM, Mohammed Sanaulla <sanaulla123 at gmail.com>
> wrote:
> >>
> >> Hello All,
> >>
> >> I am using build b166 of JDK 9.
> >>
> >> And I tried to run the following code:
> >>
> >> ScriptEngineManager engineManager = new ScriptEngineManager();
> >> ScriptEngine engine = engineManager.getEngineByName("nashorn");
> >> engine.eval("function sum(a, b) { return a + b; }");
> >> System.out.println(engine.eval("sum(1, 2);"));
> >> engine.eval("var name = 'Sanaulla'");
> >> System.out.println(engine.eval("print(`Hello Mr. ${name}`)"));
> >>
> >> The sum(1,2) works fine by printing 3. But the other part i.e using
> >> template strings throws the following exception:
> >>
> >> Exception in thread "main" javax.script.ScriptException: <eval>:1:6
> >> Expected an operand but found error
> >> print(`Hello Mr. ${name}`)
> >>     ^ in <eval> at line number 1 at column number 6
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> throwAsScriptException(NashornScriptEngine.java:469)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> compileImpl(NashornScriptEngine.java:536)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> compileImpl(NashornScriptEngine.java:523)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.api.scripting.
> NashornScriptEngine.evalImpl(NashornScriptEngine.java:401)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.api.scripting.
> NashornScriptEngine.eval(NashornScriptEngine.java:154)
> >>       at
> >> java.scripting/javax.script.AbstractScriptEngine.eval(
> AbstractScriptEngine.java:264)
> >>       at
> >> nashorn.demo/com.packt.JavascriptCodeFromJavaDemo.main(
> JavascriptCodeFromJavaDemo.java:13)
> >> Caused by: jdk.nashorn.internal.runtime.ParserException: <eval>:1:6
> >> Expected an operand but found error
> >> print(`Hello Mr. ${name}`)
> >>     ^
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.AbstractParser.error(
> AbstractParser.java:297)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.AbstractParser.error(
> AbstractParser.java:282)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.unaryExpression(Parser.java:4443)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4601)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.conditionalExpression(Parser.java:4753)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.assignmentExpression(Parser.java:4692)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.argumentList(Parser.java:3706)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.leftHandSideExpression(Parser.java:3389)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.unaryExpression(Parser.java:4421)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4601)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.conditionalExpression(Parser.java:4753)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.assignmentExpression(Parser.java:4692)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4570)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4566)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expressionStatement(Parser.java:1847)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.statement(Parser.java:1155)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.sourceElements(Parser.java:909)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.program(Parser.java:844)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.parse(Parser.java:325)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.parse(Parser.java:285)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.runtime.
> Context.compile(Context.java:1500)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.runtime.
> Context.compileScript(Context.java:1467)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.internal.runtime.
> Context.compileScript(Context.java:750)
> >>       at
> >> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> compileImpl(NashornScriptEngine.java:534)
> >>       ... 5 more
> >>
> >> I even tried running template strings from jjs console, but I am facing
> >> same issue.
> >>
> >> Can someone please guide me in using the ES6 features in Nashorn on
> JDK9?
> >>
> >> Regards,
> >> Sanaulla
> >
>
>