Improved List initialisation

Richard Warburton richard.warburton at
Tue Sep 11 21:40:27 UTC 2007

I hope this is the correct mailing list to discuss such an idea,
please correct me if I'm wrong, but core-libs sounded like it included
collections api.

Within Java we have a sugared syntax for initialising arrays, so for
example we can write this:

int[] intArray = {1,2,3};

However, list initialisation requires a very handed approach, for example:

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

Certain other languages have some sugar for this kind of thing, the
general jist of:

List l = [1,2,3];

In java we could get a similarly concise effect, with no hacking in
syntactic sugar to solve these problems, I am thinking of a syntax
along the lines of:

List<Integer> intList = new ArrayList<Integer>(1,2,3);

This could be trivially implemented as such:

public ArrayList(T ... args) {
	for (T t : args) {

The same approach could be used for Vector and the Set collections classes

I am also not aware of the process of proposing library changes, eg
would I need to do something in conjunction with the JCP?  Perhaps
someone more knowledgable could advise me.  Awaiting commentary with

  Richard Warburton

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