Estudo java Colection Lists

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import java.util.Arrays;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.function.Function;

import java.util.stream.Collectors;

import java.util.stream.IntStream;

import java.util.stream.Stream;

public class Main

{

    

    

public static void main(String[] args) {

    

    //List<String> list = new ArrayList<>();

        //list.add("one");

        //list.add("two");

        //list.add("three");

    List<String> cars = Arrays.asList("sup1", "sup2", "sup3", "Ford");

    List<Integer> numbers = Arrays.asList(10, 10, 50);

    

    var xfilter = "Ford" ;

        var x =  cars.stream().filter(v -> v == xfilter).collect(Collectors.toList());

        var x2 =  cars.stream().map(v -> v.toUpperCase()).collect(Collectors.toList());

        var x3 =  numbers.stream().reduce((n1, n2) -> n1 + n2 ).get();

        

        

        System.out.println(x3);

        

        

        for (String i : x) {

           System.out.println(i);

        }

       

}

}