How to compare Any type arraylist

var getVideoList: ArrayList<Any>

look at this my code https://paste.ofcode.org/PpCQuDjkAvtKpv7U29k7cD

I am not sure what your question is. I am guessing

ActionHelp

does not implement

equals

and

hashCode

, which means

contains

and friends will use object identity. You should either implement

equals

and

hashCode

or make it a

data class

, which will generate those for you based on the component values.

@diesieben07 this is my ActionHelp class https://paste.ofcode.org/38JtXHaKMdDD3MFrrmfP6Xz I don't understand by implement

equals

also runnable code snippet is very helpful for anyone who wants to help you

@bhavin Please actually clarify what your issue is.

ok I have an ArrayList with data which I get from another activity so I want to add new data in same list so problem is I have already some data with same id and I don't want to add same data in arraylist . I can do that If I add type in arraylist like

var getVideoList: ArrayList<ActionHelp>

but instead I'm using (i need to use )

var getVideoList: ArrayList<Any>

so I can't compare this list with ActionHelp class's data.

The generic type you specify doesn't matter,

ArrayList<ActionHelp>

and

ArrayList<Any>

will behave exactly the same in regards to equality of their items. To me it sounds like you want a

Map<ID, ActionHelp>

I checked this https://stackoverflow.com/a/30022564/6333971 It's exactly like you said before @diesieben07 but I can't understand It😅 I am trying that right now

@bhavin I am really not sure what you are trying to achieve there. Your

equals

method will not do anything useful. It classifies everything that is not the same object as "equal". Moreover, if you override

equals

you must override

hashCode

in coordination, the two methods always go together.

@diesieben07 What I'm trying to achieve is if Item is already in list than don't want to add it into list again

Yes. You can either implement

equals

and

hashCode

accordingly (so that the same item is regarded as equal) or you can use a Map if you don't want to do that.

Yeah I get It but don't know how? that's problem😅 Thanks

equals

needs to return true if you want the two objects (

this

and the parameter) to be equal.

@diesieben07 You are saying to do like this https://dzone.com/articles/working-with-hashcode-and-equals-in-java Right?

Yes. Kotlin can do all that for you automatically if you use a

data class

yeah I read that but problem is I'm not using

List < Student > studentsLst = new ArrayList < Student > ();

I m use like this

List < Any > studentsLst = new ArrayList < Any > ();

so problem is when I try to do

studentsLst.contain

is not working

It is completely irrelevant whether you use

List<Any>

or

List<Student>

@diesieben07 Thanks and I did it using equals It's very simple and I wasted 2 hours .. sorry for waste your time and I'm thinking some time "kabhi kabhi to esa lagta he apun hi bhagvan hu" feel like dumb😅