Retrieving Script Engines in Java

A script engine registers alias names with the scripting framework.

For example, the built-in Rhino scripting registers the following names with the scripting framework:

1. js
2. rhino
3. JavaScript
4. javascript
5. ECMAScript
6. ecmascript

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public class GetEngineByName {
  public static void main(String[] args) {
    ScriptEngineManager manager = new ScriptEngineManager();
    /* Retrieve a ScriptEngine registered with the rhino name */
    ScriptEngine jsEngine = manager.getEngineByName("rhino");
    if (!(jsEngine == null)) {
      System.out.println(jsEngine);
    } else {
      System.out.println("\nNo supported script engine foundregistered as Rhino.");
    }
  }
}