Example usage for javax.script ScriptEngine eval

Introduction

In this page you can find the example usage for javax.script ScriptEngine eval.

Prototype

public Object eval(Reader reader) throws ScriptException;

Source Link

Document

Same as eval(String) except that the source of the script is provided as a Reader

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager mgr = new ScriptEngineManager();
    ScriptEngine engine = mgr.getEngineByName("javascript");

    engine.eval(new InputStreamReader(Main.class.getResourceAsStream("scripting.js")));

    List<String> list1 = (List<String>) engine.get("list1");
    if (list1 != null) {
        for (String s : (List<String>) list1) {
            System.out.println(s);
        }/*  ww  w . ja  va2s.  com*/
    }
    Invocable engineInv = (Invocable) engine;
    Object obj = engine.get("listObject");
    Object list2 = engineInv.invokeMethod(obj, "getList2");
    if (list2 != null) {
        for (String s : (List<String>) list2) {
            System.out.println(s);
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
    engine.eval("load('res/nashorn5.js')");

    Invocable invocable = (Invocable) engine;

    Product product = new Product();
    product.setName("Rubber");
    product.setPrice(1.99);/*from w w w  . j a va  2  s . c  o  m*/
    product.setStock(1037);

    Object result = invocable.invokeFunction("getValueOfGoods", product);
    System.out.println(result);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
    engine.eval(new FileReader("res/nashorn2.js"));
}

From source file:InvocableTest.java

public static void main(String args[]) {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("javascript");
    try {//from   w w w .ja va  2s  .com
        engine.eval("function myFunction(name){var output = '';"
                + "  for (i = 0; i <= name.length; i++) {output = name.charAt(i)+'-'+ output"
                + "  } return output;}");
        Invocable invokeEngine = (Invocable) engine;
        Object o = invokeEngine.invokeFunction("myFunction", "abcde");
        System.out.println(o);

    } catch (NoSuchMethodException e) {
        System.err.println(e);
    } catch (ScriptException e) {
        System.err.println(e);
    }
}

From source file:Main.java

public static void main(String[] args) throws ScriptException, NoSuchMethodException {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
    engine.eval("function foo(predicate, obj) { return !!(eval(predicate)); };");

    Invocable invocable = (Invocable) engine;

    Person person = new Person();
    person.setName("Hans");

    String predicate = "obj.getLengthOfName() >= 4";
    Object result = invocable.invokeFunction("foo", predicate, person);
    System.out.println(result);/*w  ww  .jav  a 2  s .  c o  m*/
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    String script = "var year = 2015";

    engine.eval(script);
    Object year = engine.get("year");
    System.out.println("year's class:" + year.getClass().getName());
    System.out.println("year's value:" + year);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");
    String script = "print('Hello', 'World!');";
    engine.eval(script);
    script = "print('Hello World!');";
    engine.eval(script);//from  ww w  .  j  a v a 2s  .com
}

From source file:Main.java

public static void main(String[] args) throws ScriptException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    Object result = null;/*w  w w.ja  v a2  s .  co  m*/
    result = engine.eval("1 + 2;");
    System.out.println(result);
    result = engine.eval("1 + 2; 3 + 4;");
    System.out.println(result);
    result = engine.eval("1 + 2; 3 + 4; var v = 5; v = 6;");
    System.out.println(result);
    result = engine.eval("1 + 2; 3 + 4; var v = 5;");
    System.out.println(result);
    result = engine.eval("print(1 + 2)");
    System.out.println(result);

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");
    String script = "printf('%d + %d = %d', 1, 2, 1 + 2);";
    engine.eval(script);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    // create a script engine manager
    ScriptEngineManager factory = new ScriptEngineManager();
    // create a JavaScript engine
    ScriptEngine engine = factory.getEngineByName("JavaScript");
    // evaluate JavaScript code from String
    Object obj = engine.eval("1+2");
    System.out.println(obj);/*from  w ww.  j  a va2  s  .co m*/
}