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Index › Programming Questions & Help › Syntax Questions › getting data from an arraylist
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getting data from an arraylist (Read 558 times)
Cedric
getting data from an arraylist
Feb 8th, 2010, 7:13pm  
Hi, this is clearly a syntax question. guess its easy to answer.
Ive created an arraylist of objects holding some data in different variables.

when using an array I usually do it that way to print out the stored x,y coordinates.

for(int i = 0; i<object.length();i++){
println(object[i].x);
println(object[i].y);
}

how would that look like when using an arraylist ?
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NoahBuddy
Re: getting data from an arraylist
Reply #1 - Feb 8th, 2010, 10:40pm  
Code:
Coordinate xy; //some class that contains an x and y value

ArrayList al = new ArrayList();

//Add things to the list...

for(int i=0; i<al.size(); i++){
  xy = (Coordinate)al.get(i); //Cast the returned Object to something we know

  println(xy.x + "-" + xy.y);
}

Or for a working example:
http://processing.org/reference/ArrayList.html
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Cedric
Re: getting data from an arraylist
Reply #2 - Feb 9th, 2010, 4:33am  
alright, i know why it was not working. i used the same name for the arraylist inside the class i am storing the objects in as for the objects itself Smiley
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