Multiple datatypes in linkedlist

Question

How can we insert multiple data types to a linkedlist.
I am encountering a WARNING message.
https://code.sololearn.com/cVyyf22458rT/?ref=app

Answer 1

*How can we insert multiple data types to a linkedlist*
-> Pass `Object` as type parameter to list ctor. line 9:

```
LinkedList<Object> link=new LinkedList<>();
```

*I am encountering a WARNING message.*
-> `Integer(int)` ctor is deprecated and it's recommended to use factory method Integer.valueOf() for better performance. Same for other wrapper classed like Double, Character, Float

So wherever you wrote Integer(someinthere) use Integer.valueOf(someinthere)

or better yet, let java handle this with autoboxing. just write list.add(someinthere). Java 5 and above will automatically wrap primitives in respective wrapper classes. Sololearn is currently using Java 16 so it'll work fine.

list.add(Integer.valueOf(10)) is same as list.add(10)

Answer 2

🇮🇳Omkar🕉 Really appreciated.Stay safe

Answer 3

🇮🇳Omkar🕉 even we did that we get another warning
Java uses unchecked or unsafe operations. recompile with -xlint:unchecked for details.
(I have to specify the type of linked
List).
Any thoughts?

Answer 4

sid,
Give link of your code

Answer 5

Ok. I see you made changes in same code.

I told you to pass type parameter to LinkedList's constructor already.

LinkedList<Object> list = new LinkedList<>();