Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ?<br/><br/>List list1 = new ArrayList<>();<br/>list1.add(5);<br/>list1.add("5");

Interview Questions and Answers

Q1. Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ?

List list1 = new ArrayList<>();
list1.add(5);
list1.add("5");

Ans. If we don't declare the list to be of specific type, it treats it as list of objects.

int 1 is auto boxed to Integer and "1" is String and hence both are objects.

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