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JavaScriptEngineInfo.java - JavaScript Engine Details
How to get JavaScript Engine detailed information from the SJP API?
✍: FYIcenter
If you want to verify the JavaScript Engine detailed information, you can try the following example program:
// Copyright (c) 2017 FYIcenter.com import javax.script.ScriptEngineManager; import javax.script.ScriptEngine; import javax.script.ScriptEngineFactory; public class JavaScriptEngineInfo { public static void main(String[] args) throws Exception { ScriptEngineManager m = new ScriptEngineManager(); ScriptEngine e = m.getEngineByName("JavaScript"); System.out.println("\nFrom JavaScript:"); e.eval("print(' Hello world!')"); ScriptEngineFactory f = e.getFactory(); System.out.println("\nJavaScript engine info:"); System.out.println(" Engine name: "+f.getEngineName()); System.out.println(" Engine version: "+f.getEngineVersion()); System.out.println(" Language name: "+f.getLanguageName()); System.out.println(" Language version: "+f.getLanguageVersion()); System.out.println(" Engine class: "+e.getClass().getName()); System.out.println(" Factory class: "+f.getClass().getName()); System.out.println(" Manager class: "+m.getClass().getName()); } }
Compile the example with Java SE 7 JDK compiler:
>\fyicenter\jdk-1.7.0\bin\javac JavaScriptEngineInfo.java >\fyicenter\jdk-1.7.0\bin\java JavaScriptEngineInfo From JavaScript: Hello world! JavaScript engine info: Engine name: Mozilla Rhino Engine version: 1.7 release 3 PRERELEASE Language name: ECMAScript Language version: 1.8 Engine class: com.sun.script.javascript.RhinoScriptEngine Factory class: com.sun.script.javascript.RhinoScriptEngineFactory Manager class: javax.script.ScriptEngineManager
The output tells you the Rhino JavaScript library is the default JavaScript engine in Java SE 7.
⇒ JavaScript Engine Changed in Java SE 8
⇐ JavaScriptHello - SJP API Hello Example
2017-07-25, 1702🔥, 0💬
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