Adding to ArrayList

Programming Questions

dlillard5

in Programming Questions • 1 year ago

When I run this code, nothing happens when I click... Does the for loop not have enough time to finish? is there another way to do this?

void mouseReleased() {

for (int i=miners.size()-1;i>=0;i--) {

if (dist(mouseX+vx, mouseY, resources[i].x,resources[i].y)<50) {

miners.add(new miner(mouseX+vx, mouseY));

cash-=100;

}

miners is a list of objects from the class miner and the vx variable is used with translate... and resources is an array of objects from my resource class... Any ideas? thanks

Replies(4)

PhiLho

" Does the for loop not have enough time to finish?"
No. Such loop is never interrupted.

Add a println() in your if, to see if the condition is ever meet. Perhaps you need a mouseX-vx instead, or something like that.

dlillard5

Re: Adding to ArrayList

1 year ago

I was printing cash in draw before, I also printed cash and my i variable inside the for loop but nothing was printed... A class isn't being created because I put a println in my miner's update too... I also tried moving the mouseReleased around in my code but still no result... So it has to be my conditions...

dlillard5

Re: Adding to ArrayList

1 year ago

Resources was an array not an arrayList... So this was my finish product

void mouseReleased() {

boolean mcompleted=false;

println("mouse released");

for (int j=0;j<resources.length;j++) {

if (dist(mouseX+vx, mouseY, resources[j].x, resources[j].y)<50 && cash>=100) {

mcompleted=true;

}

if (mcompleted==true) {

miners.add(new miner(mouseX+vx, mouseY));

cash-=100;

}

quarks

Re: Adding to ArrayList

1 year ago

void mouseReleased() {
for (int i=miners.size()-1;i>=0;i--) {
if (dist(mouseX+vx, mouseY, resources[i].x,resources[i].y)<50) {
miners.add(new miner(mouseX+vx, mouseY));
cash-=100;
}
}}

Just had a thought but did the arraylist miners start as empty i.e. no miners because if that was the case then the for loop is never entered because i will be initialised to -1 (since miners.size() == 0) which means the condition i>=0 is false so the if statement is never executed.

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