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Index › Programming Questions & Help › Syntax Questions › Define ArrayList by hand

OgreProgrammer YaBB Newbies Offline Posts: 26	Define ArrayList by hand Mar 7th, 2009, 1:54am   We can define an array with the syntax = {1, 21, 53, 54}; But I cannot figure out how to do that with an ArrayList. Is this possible? Can you show me how it is done?
	Anyone can be an artist-It just takes the desire to not get up early. -Tigre

PhiLho  YaBB Moderator Offline Posts: 4190 Near Paris (France)

Re: Define ArrayList by hand Reply #1 - Mar 7th, 2009, 9:47am   Basically, no. Now, there are tricks to workaround this: Double Brace Initialization and Building your own literals in Java - Lists, and Arrays. Tricks seen in Hidden Features of Java. Code: ArrayList als = new ArrayList() {{ add("Foo"); add("Bar"); add("42"); }}; void setup() { for (int i = 0; i < als.size(); i++) { println((String) als.get(i)); } } Note that such init will actually create an anonymous class!

OgreProgrammer YaBB Newbies Offline Posts: 26	Re: Define ArrayList by hand Reply #2 - Mar 7th, 2009, 4:09pm   Thanks very much Phil. Your answer is filled with enormous amounts of information.
	Anyone can be an artist-It just takes the desire to not get up early. -Tigre