Re: create an ArrayList + add a first element and return the List
in ONE statement possible ?
Robin Wenger wrote:
As the subject said I wonder whether there is really no one-liner for creating an ArrayList + assign of the first element +
return the new list. I have expected the following to work in such a way but it does NOT work:
Object77 oneObject = new Object77();
ArrayList<Object77> lObj = new ArrayList<Object77>(oneObject);
The following returns a boolean and not the desired List:
boolean success = (new ArrayListObject77>()).add(oneObject);
Any other ideas?
Or do I really have to split this simple operation into separate statements?
Why is it a problem to split it into separate statements?
Ian Pilcher wrote:
There are lots of ways, including:
ArrayList<Object77> lObj = new ArrayList<Object77>(
The declared type should probably be 'List<Object77>'.
The Javadocs might also lead one to:
List <Object77> lObj = new ArrayList <Object77>
( Arrays.asList( new Object77() ));
or, if you aren't particular about the implementation:
List <Object77> lObj = Arrays.asList( new Object77() );
which saves a copy operation.
As Ian said, there are many ways. Know thy API. The study of the collections
types is especially rewarding.
Ceci n'est pas une pipe.
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