Java ScriptEngine access variable in Javascript
import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; import javax.script.ScriptException; public class Main { public static void main(String[] args) { // Get the Nashorn engine ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("JavaScript"); // Write a script that declares a global variable named year and // assign it a value of 1969. String script = "var year = 2020"; try {// ww w. ja v a 2 s. co m // Execute the script engine.eval(script); // Get the year global variable from the engine Object year = engine.get("year"); // Print the class name and the value of the variable year System.out.println("year's class: " + year.getClass().getName()); System.out.println("year's value: " + year); } catch (ScriptException e) { e.printStackTrace(); } } }