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This package provides the javax.script integration, which is the preferred way to use Nashorn. You will ordinarily do this to obtain an instance of a Nashorn script engine:
import javax.script.*;
...
ScriptEngine nashornEngine = new ScriptEngineManager().getEngineByName("Nashorn");

Nashorn script engines implement the optional Invocable and Compilable interfaces, allowing for efficient pre-compilation and repeated execution of scripts. In addition, this package provides nashorn specific extension classes, interfaces and methods. See NashornScriptEngineFactory for further details.

Since:1.8u40
/** * This package provides the {@code javax.script} integration, which is the preferred way to use Nashorn. * You will ordinarily do this to obtain an instance of a Nashorn script engine: * <pre> * import javax.script.*; * ... * ScriptEngine nashornEngine = new ScriptEngineManager().getEngineByName("Nashorn"); * </pre> * <p>Nashorn script engines implement the optional {@link javax.script.Invocable} and {@link javax.script.Compilable} * interfaces, allowing for efficient pre-compilation and repeated execution of scripts. In addition, * this package provides nashorn specific extension classes, interfaces and methods. See * {@link jdk.nashorn.api.scripting.NashornScriptEngineFactory} for further details. * * @since 1.8u40 */
package jdk.nashorn.api.scripting;