ArrayList

sueno

When I make an arraylist like this: > ArrayList location = new ArrayList(); < And I want to add a new PVector to this arraylist I think the program reads it as the function PVector.add(PVector); However, instead of adding some value to a vector I want to add a new PVector to the arraylist, how can i do this?

KevinWorkman

Please post an MCVE that demonstrates the problem.

sueno

Thank you! While making the MCVE I found the solution, Thanks a lot :)

kfrajer

The reference shows an example, not using PVector but another class called particle:

https://processing.org/reference/ArrayList.html

Following the example, you will need to do this:

void setup(){
size(100,100);
noLoop();
ArrayList<PVector> vkts = new ArrayList<PVector>();
vkts.add(new PVector(100,100));
vkts.add(new PVector());
vkts.add(new PVector(random(100),random(100)));
}

void draw(){}

I hope this helps,

Kf

GoToLoop

PVector::add() method isn't the same as ArrayList::add():

1. https://Processing.org/reference/PVector_add_.html
2. http://docs.Oracle.com/javase/8/docs/api/java/util/ArrayList.html#add-E-

Also, look up how to declare a container using the angle brackets in order to specify its type content:
https://Processing.org/reference/ArrayList.html

import java.util.List;
final List<PVector> vecs = new ArrayList<PVector>();

vecs.add(new PVector());
vecs.add(PVector.random3D(this));
println(vecs);

vecs.get(0).add(vecs.get(1));
println(vecs.get(0));

exit();