Advanced JAVA Generics code question

Question

Why my code got no output , shouldn't it should be output as "i am a camera".
https://code.sololearn.com/cy06NMr7BJRO

Answer 1

ArrayList<camera> list1 = new ArrayList<camera>();
list.add(new camera());
list.add(new camera());

You want to fill list1 with values but you filled list.

Answer 2

Denise Roßberg Thanks so much

Answer 3

Cause you not attentive, and list that you want to print don't contain any values.