Thread: ArrayList.size()

I have a bit of problem...

this case works:

ArrayList<Bullet> bullets = new ArrayList<>();

while(true){
System.out.println(bullets.size());

}
it prints out number of elements progressively (other part of code adds objects into arraylist)
but when I put bullets.size() in statement, it prints nothing even though size of arraylist increases

ArrayList<Bullet> bullets = new ArrayList<>();

while(true){

if(bullets.size() > 0){
System.out.println(bullets.size());
}

}

like I dont understand what is the problem...it doesnt work in loops as well

edit: I tried to create own method instead of size() but when I called it at the same place in statement it didnt work as well... what could possibly be th reason

public class ArbitraryClass {
  private Integer someValue = 0;
 
  ArbitraryClass(Integer construction_initializer){
    someValue = construction_initializer;
  }
 
} // ArbitraryClass

import java.util.ArrayList;
 
public class Scratchpad {
  public static void main(String[] args) {
 
    ArrayList<ArbitraryClass> myList = new ArrayList<>();
    myList.add(new ArbitraryClass(2));
    myList.add(new ArbitraryClass(4));
    myList.add(new ArbitraryClass(6));
 
    System.out.println(myList.size());
    System.out.println(myList.size()+10);
    System.out.println(
      String.format("Count of elements in myList: %s",
        myList.size()
      )
    );
 
  } // main
} // Scratchpad

Originally Posted by output

3
13
Count of elements in myList: 3