This example show you how you can obtain a script engine for a specific language name and specific language version. In the code below we try to obtain script engine instance for ECMAScript
version ECMAScript 262 Edition 11
.
package org.kodejava.script;
import javax.script.ScriptEngineManager;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import java.util.List;
public class ScriptEngineSearch {
public static void main(String[] args) {
String languageName = "ECMAScript";
String languageVersion = "ECMAScript 262 Edition 11";
// Creating a ScriptEngineManager and get the list of available
// engine factories.
ScriptEngineManager manager = new ScriptEngineManager();
List<ScriptEngineFactory> factories = manager.getEngineFactories();
// We obtain a ScriptEngine from the available factories where
// the language name is "ECMAScript" and the version is
// "ECMAScript 262 Edition 11". ECMAScript is the standard name
// for JavaScript programming language.
//
// If we found the desired language we then get the ScriptEngine
// by calling factory's getScriptEngine() method.
ScriptEngine engine = null;
for (ScriptEngineFactory factory : factories) {
String language = factory.getLanguageName();
String version = factory.getLanguageVersion();
if (language.equals(languageName)
&& version.equals(languageVersion)) {
engine = factory.getScriptEngine();
break;
}
}
if (engine != null) {
try {
engine.eval("print('Hello There')");
} catch (ScriptException e) {
e.printStackTrace();
}
}
}
}
Maven Dependencies
<dependencies>
<dependency>
<groupId>org.graalvm.js</groupId>
<artifactId>js</artifactId>
<version>22.3.2</version>
</dependency>
<dependency>
<groupId>org.graalvm.js</groupId>
<artifactId>js-scriptengine</artifactId>
<version>22.3.2</version>
</dependency>
</dependencies>
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