import jdk.nashorn.internal.runtime.Version; //导入依赖的package包/类
@Override
public Object getParameter(final String key) {
    switch (key) {
    case ScriptEngine.NAME:
        return "javascript";
    case ScriptEngine.ENGINE:
        return "Oracle Nashorn";
    case ScriptEngine.ENGINE_VERSION:
        return Version.version();
    case ScriptEngine.LANGUAGE:
        return "ECMAScript";
    case ScriptEngine.LANGUAGE_VERSION:
        return "ECMA - 262 Edition 5.1";
    case "THREADING":
        // The engine implementation is not thread-safe. Can't be
        // used to execute scripts concurrently on multiple threads.
        return null;
    default:
        throw new IllegalArgumentException("Invalid key");
    }
}
 

import jdk.nashorn.internal.runtime.Version; //导入依赖的package包/类
@Override
public Object getParameter(final String key) {
    switch (key) {
    case ScriptEngine.NAME:
        return "javascript";
    case ScriptEngine.ENGINE:
        return "Oracle Nashorn";
    case ScriptEngine.ENGINE_VERSION:
        return Version.version();
    case ScriptEngine.LANGUAGE:
        return "ECMAScript";
    case ScriptEngine.LANGUAGE_VERSION:
        return "ECMA - 262 Edition 5.1";
    case "THREADING":
        // The engine implementation is not thread-safe. Can't be
        // used to execute scripts concurrently on multiple threads.
        return null;
    default:
        return null;
    }
}
 

import jdk.nashorn.internal.runtime.Version; //导入依赖的package包/类
/**
 * Constructor.
 * 
 * @throws LanguageAdapterException
 *         In case of an initialization error
 */
public NashornAdapter() throws LanguageAdapterException
{
	super( "Nashorn", Version.version(), "JavaScript", new NashornScriptEngineFactory().getLanguageVersion(), Arrays.asList( "js", "javascript", "nashorn" ), "js", Arrays.asList( "javascript", "js", "nashorn" ),
		"nashorn" );

	try
	{
		System.setProperty( "nashorn.persistent.code.cache", getCacheDir().getCanonicalPath() );
	}
	catch( IOException x )
	{
		throw new LanguageAdapterException( NashornAdapter.class, "Could not access cache directory: " + getCacheDir(), x );
	}

	PrintWriter out = new PrintWriter( new ExecutionContextWriter(), true );
	PrintWriter err = new PrintWriter( new ExecutionContextErrorWriter(), true );

	// See: jdk.nashorn.internal.runtime.ScriptEnvironment
	Options options = new Options( "nashorn", err );
	options.set( "print.no.newline", true );
	options.set( "persistent.code.cache", true );
	ErrorManager errors = new ErrorManager( err );

	context = new Context( options, errors, out, err, getClass().getClassLoader() );
}
 

import jdk.nashorn.internal.runtime.Version; //导入依赖的package包/类
@Test
public void versionTest() {
    final ScriptEngineManager m = new ScriptEngineManager();
    final ScriptEngine e = m.getEngineByName("nashorn");
    assertEquals(e.getFactory().getEngineVersion(), Version.version());
}