javax.script.*

import javax.script.*;

ScriptEngineManager mgr = new ScriptEngineManager();
List factories =
   mgr.getEngineFactories();
for (ScriptEngineFactory factory: factories) {
 System.out.println("ScriptEngineFactory Info");
 String engName = factory.getEngineName();
 String engVersion = factory.getEngineVersion();
 String langName = factory.getLanguageName();
 String langVersion = factory.getLanguageVersion();
 System.out.printf("\tScript Engine: %s (%s)\n",
     engName, engVersion);
 List engNames = factory.getNames();
 for(String name: engNames) {
   System.out.printf("\tEngine Alias: %s\n", name);
 }
 System.out.printf("\tLanguage: %s (%s)\n",
     langName, langVersion);
} 

//The scripting API consists of interfaces and classes that define Java TM Scripting Engines and provides a framework for their use in Java applications.

ScriptEngineFactory Info
Script Engine: Mozilla Rhino (1.6 release 2)
Engine Alias: js
Engine Alias: rhino
Engine Alias: JavaScript
Engine Alias: javascript
Engine Alias: ECMAScript
Engine Alias: ecmascript
Language: ECMAScript (1.6)

public interface ScriptEngine

static String  ARGV
      Reserved key for a named value that passes an array of positional arguments to a script.
static String  ENGINE
      Reserved key for a named value that is the name of the ScriptEngine implementation.
static String  ENGINE_VERSION
      Reserved key for a named value that identifies the version of the ScriptEngine implementation.
static String  FILENAME
      Reserved key for a named value that is the name of the file being executed.
static String  LANGUAGE
      Reserved key for a named value that is the full name of Scripting Language supported by the implementation.
static String  LANGUAGE_VERSION
      Reserved key for the named value that identifies the version of the scripting language supported by the implementation.
static String  NAME
      Reserved key for a named value that identifies the short name of the scripting language.

Bindings  createBindings()
       Returns an uninitialized Bindings.
Object  eval(Reader reader)
       Same as eval(String) except that the source of the script is provided as a Reader
Object  eval(Reader reader, Bindings n)
       Same as eval(String, Bindings) except that the source of the script is provided as a Reader.
Object  eval(Reader reader, ScriptContext context)
       Same as eval(String, ScriptContext) where the source of the script is read from a Reader.
Object  eval(String script)
       Executes the specified script.
Object  eval(String script, Bindings n)
       Executes the script using the Bindings argument as the ENGINE_SCOPE Bindings of the ScriptEngine during the script execution.
Object  eval(String script, ScriptContext context)
       Causes the immediate execution of the script whose source is the String passed as the first argument.
Object  get(String key)
       Retrieves a value set in the state of this engine.
Bindings  getBindings(int scope)
       Returns a scope of named values.
ScriptContext  getContext()
       Returns the default ScriptContext of the ScriptEngine whose Bindings, Reader and Writers are used for script executions when no ScriptContext is specified.
ScriptEngineFactory  getFactory()
       Returns a ScriptEngineFactory for the class to which this ScriptEngine belongs.
void  put(String key, Object value)
       Sets a key/value pair in the state of the ScriptEngine that may either create a Java Language Binding to be used in the execution of scripts or be used in some other way, depending on whether the key is reserved.
void  setBindings(Bindings bindings, int scope)
       Sets a scope of named values to be used by scripts.
void  setContext(ScriptContext context)
       Sets the default ScriptContext of the ScriptEngine whose Bindings, Reader and Writers are used for script executions when no ScriptContext is specified.