calling a javascript function from java with nashorn

winterbe · winterbe · commit fafa0e0692ad · 2014-03-30T21:18:26.000+02:00
diff --git a/res/nashorn1.js b/res/nashorn1.js
@@ -0,0 +1,4 @@
+var fun = function(name) {
+    print('Hi there, ' + name);
+    return "success";
+};
diff --git a/src/com/winterbe/java8/Nashorn1.java b/src/com/winterbe/java8/Nashorn1.java
@@ -0,0 +1,25 @@
+package com.winterbe.java8;
+
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+
+/**
+ * @author Benjamin Winterberg
+ */
+public class Nashorn1 {
+
+    public static void main(String[] args) throws ScriptException, FileNotFoundException, NoSuchMethodException {
+        ScriptEngine engine = new ScriptEngineManager()
+                .getEngineByName("nashorn");
+        engine.eval(new FileReader("res/nashorn1.js"));
+
+        Invocable invocable = (Invocable) engine;
+        Object result = invocable.invokeFunction("fun", "Peter Parker");
+        System.out.println(result);
+    }
+
+}
