List initialization syntax

[Seetharaman Venkatasamy]

Hi Folks,

what is the difference between

  List<Integer> alist = new ArrayList<Integer>(){};  

and

  List<Integer> alist = new ArrayList<Integer>();  

please explain

[Christophe Verré]

The first one allows you to create an anonymous class, subclass of ArrayList, where you can override the superclass methods.

List<Integer> alist = new ArrayList<Integer>(){
    @Override
    public String toString() {
        return "Useless";
    }
};
System.out.println(alist);

[Seetharaman Venkatasamy]

thanks Christophe Verré