So I have a class that is a bullet. And if the bullet is out of bound, then it will delete the object. But how do I do this? Here is my code. class Bullet { if (xpos > 500 || ypos > 500) delete object // how do I do this part? } As you can see, I want to delete the object if it goes ou…

This sketch demonstrates how to do this. It starts by creating 200 bullets with randon position and speed and stores them in an array list. When a bullet moves off the screen it is considered dead and is removed from the list. The number of remaining bullets is shown. int n = 200; void setup() { …

It depends from how you use the bullet. Are they in an Arraylist? Use remove here. Or in an array? I think you can outside the class say bullet = null; but the you need an if-clause to check the bullet for null before using it

Thank you. Could you also explain what concurrent modification exception is?

If we look the code to remove dead bullets we are are doing two things we are iterating over the list (visiting each bullet object in the list) with the for-loop inside the for-loop we are removing bullets from the list, hence modifying the list The problem is that under certain circumstance, doi…

Oh okay thank you. What about Vector? Can I use that too?

Problem regarding ArrayList - Processing 2.x and 3.x Forum [image] Help with a short game code Coding Questions We can’t use method remove() when using an “enhanced” for ( : ) {} style! no_entry_sign Use a vanilla for ( ; ; ) {} style instead. Preferably, w/ backwards i…

The Vector class has the same API as the ArrayList so yes you can use it instead. I should point out that the Vector class is synchronized (thread safe) so might be slower than ArrayList. Since your code is single threaded you don’t need a synchronized class so I would stick with ArrayList unless th…

How to delete an object in a class?

Processing Coding Questions

GoToLoop March 27, 2020, 5:18pm 7

Problem regarding ArrayList - Processing 2.x and 3.x Forum

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How to delete an object in a class?

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