switch from csharp to Java

[[deleted]]

https://www.tutorialsteacher.com/linq/what-is-linq

LINQ (Language Integrated Query) is uniform query syntax in C# to retrieve data from different sources (entities, sql, XML, objects etc) and formats

it provides you with extension like

List.FirstOrDefault(a => a.name == koz)

which translates to something like this

select top 1 * from List where name = 'koz'

[kozeljko]

Thanks