i need to find a integer data in arraylist?

Question

I have an Arraylist. If user enter the same number secondly I want to show to user. For this I need to find Arraylist have it or not.

I hop

Answer 1

No, you have not. But here's my best guess:

List values = Arrays.asList( 1, 2, 4, -5, 44 );
int userValue = 44;
if (!values.contains(userValue)) {
    values.add(userValue);
}