Random Image Using an Array

Processing
11

I have an arraylist that uses mouse clicks to select random elements, which are then removed from the list. When the list is empty, I want to refresh with a click and start over. The way I am trying this is by creating a new list, adding removed elements to it, then setting the old list equal to it.

    myTiles = newTiles;//refresh myTiles with all elements
    newTiles.clear();//clear newTiles to start over

It’s not quite working. Help appreciated. Here’s all the code:

int index;

//array of Tile objects
ArrayList <Tile> myTiles = new ArrayList <Tile>();

//also create a second array list to 'reset' from
ArrayList <Tile> newTiles = new ArrayList <Tile>();

void setup(){
  background(0);
  size(300,300);
    
  myTiles.add(new Tile("apple", loadImage("fruit0.jpg")));
  myTiles.add(new Tile("orange", loadImage("fruit1.jpg")));
  myTiles.add(new Tile("pear", loadImage("fruit2.jpg")));
  
  textAlign(CENTER);
  textSize(35);
  text("Random Fruits",width/2,height/3);
  text("Click to play",width/2,2*height/3);
}

void draw(){
}

void mouseClicked(){
  if(myTiles.size() > 0){
    index = int(random(myTiles.size()));
    myTiles.get(index).display();
    
  }else{
    background(0);
    textSize(25);
    text("Out of Names", width/2,height/3);
    text("Click to Play Again", width/2,2*height/3);

    myTiles = newTiles;//refresh myTiles with elements
    newTiles.clear();//clear newTiles to start over
 }
  }
}

//Tile object 
class Tile{  //Tile knows an image and name
  
 PImage img;  //pulls in image
 String item;  //pulls in name
 
 
 Tile(String tempItem, PImage tempImg){//constructor
   item = tempItem;  //name pulled in
   img = tempImg;  //image pulled in
 }
 
 void display(){
   background(0);
   textSize(70);
   fill(255,0,0);
   text(item, width/2, 3*height/4);
   
   imageMode(CENTER);
   img.resize(100,100);
   image(img,width/2,height/4);
   
   myTiles.remove(index);
   newTiles.add(new Tile(item,img));
 }
}