Search code examples
javanashorn

java nashorn, how to add code to a constructor

How can i add code to a construtor of a javascript class. The code in Java is very simple:

public class MyObject extends SomeAbstractObject {
  public MyObject() {
     super();
     System.out.println("hello");
  }
}

I know that its possible to extend java class like this (let's assume i did some bindings): 

var myJSClass= Java.extend(SomeAbstractObject.static 
     {methods i want to override}
})

But how can i replicate my java example in javascript and nashorn?

Solution

  • No, Nashorn generates constructors for the subclass - these can not be "customized". While you can override non-final methods by script functions, you can't "extend" constructors.