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import javax.script.Bindings;

import javax.script.ScriptContext;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

import javax.script.SimpleScriptContext;

@SuppressWarnings("javadoc")

public class MultiScopes {

    public static void main(final String[] args) throws Exception {

        final ScriptEngineManager manager = new ScriptEngineManager();

        final ScriptEngine engine = manager.getEngineByName("nashorn");

        engine.put("x", "hello");

        // print global variable "x"

        engine.eval("print(x);");

        // the above line prints "hello"

        // Now, pass a different script context

        final ScriptContext newContext = new SimpleScriptContext();

        newContext.setBindings(engine.createBindings(), ScriptContext.ENGINE_SCOPE);

        final Bindings engineScope = newContext.getBindings(ScriptContext.ENGINE_SCOPE);

        // add new variable "x" to the new engineScope

        engineScope.put("x", "world");

        // execute the same script - but this time pass a different script context

        engine.eval("print(x);", newContext);

        // the above line prints "world"

    }

}