In Scala I would write an abstract class with an abstract attribute path:

abstract class Base {

    val path: String

}

class Sub extends Base {

    override val path = "/demo/"

}

Java doesn't know abstract attributes and I wonder what would be the best way to work around this limitation.

My ideas:

a) constructor parameter

abstract class Base {

  protected String path;

  protected Base(String path) {
    this.path = path;
  }

}

class Sub extends Base {

    public Sub() {
        super("/demo/");
    }

}

b) abstract method

abstract class Base { // could be an interface too

  abstract String getPath();

}

class Sub extends Base {

    public String getPath() {
        return "/demo/";
    }

}

Which one do you like better? Other ideas?

I tend to use the constructor since the path value should not be computed at runtime.