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:FuncEvaluator.java

  public static void main(String[] args) {
  if (args.length != 2) {
    System.err/*from  w w w . j  a v  a  2s. c o m*/
        .println("usage: java FuncEvaluator scriptfile " + "script-exp");
    return;
  }

  ScriptEngineManager manager = new ScriptEngineManager();
  ScriptEngine engine = manager.getEngineByName("rhino");

  try {
    System.out.println(engine.eval(new FileReader(args[0])));
    System.out.println(engine.eval(args[1]));
  } catch (ScriptException se) {
    System.err.println(se.getMessage());
  } catch (IOException ioe) {
    System.err.println(ioe.getMessage());
  }
}

From source file:Main.java

public static void main(String[] args) {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("js");
    String script = "print ('www.java2s.com')";
    try {//w  w w.j a v  a  2s .co  m
        engine.eval(script);
    } catch (ScriptException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void main(String args[]) {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("javascript");
    try {//  w  w  w .ja  v a  2 s.c o  m
        engine.put("name", "abcde");
        engine.eval("var output = '';for (i = 0; i <= name.length; i++) {"
                + "  output = name.charAt(i)+'-' + output" + "}");
        String name = (String) engine.get("output");
        System.out.println(name);
    } catch (ScriptException e) {
        System.err.println(e);
    }
}

From source file:RunJavaScript.java

public static void main(String args[]) {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("javascript");
    try {/*from   w w w  . j a va 2s. com*/
        Double hour = (Double) engine.eval("var date = new Date();" + "date.getHours();");
        String msg;
        if (hour < 10) {
            msg = "Good morning";
        } else if (hour < 16) {
            msg = "Good afternoon";
        } else if (hour < 20) {
            msg = "Good evening";
        } else {
            msg = "Good night";
        }
        System.out.println(hour);
        System.out.println(msg);
    } catch (ScriptException e) {
        System.err.println(e);
    }
}

From source file:Main.java

public static void main(String[] args) {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("js");
    try {//from   ww  w  .  ja v  a  2  s .c o  m
        FileReader reader = new FileReader("yourFile.js");
        engine.eval(reader);
        reader.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] args) {
    String scriptFileName = "c:/test.js";
    Path scriptPath = Paths.get(scriptFileName);
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");
    try {//  w w w.  j a  v  a2 s. com
        Reader scriptReader = Files.newBufferedReader(scriptPath);
        engine.eval(scriptReader);
    } catch (IOException | ScriptException e) {
        e.printStackTrace();
    }
}

From source file:ScriptExecutionReaderDemo.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine jsEengine = manager.getEngineByExtension("js");
    Reader reader = new InputStreamReader(new FileInputStream("yourJavaScript.js"));
    jsEengine.eval(reader);
}

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(msg.toUpperCase());print(msg.indexOf('a'))";
    engine.put("msg", "java2s.com");
    engine.eval(script);
}

From source file:Main.java

public static void main(String[] args) {

    try {/*from w  w  w.ja  v a2s.com*/

        ScriptEngineManager sem = new ScriptEngineManager();
        ScriptEngine se = sem.getEngineByName("JavaScript");
        String myExpression = "('abc' == 'xyz' && 'thy' == 'thy') || ('ujy' == 'ujy')";
        System.out.println(se.eval(myExpression));

    } catch (ScriptException e) {

        System.out.println("Invalid Expression");
        e.printStackTrace();

    }
}

From source file:Main.java

public static void main(String[] args) {
    // Get the Nashorn engine
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    String script = "print(msg)";
    try {/*from w  w w . ja  v a 2 s  . c o m*/
        engine.put("msg", "Hello from Java program");
        engine.eval(script);
    } catch (ScriptException e) {
        e.printStackTrace();
    }
}