Two_Lists

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Two_Lists {
    public static void main(String[] args) throws Exception {

        BufferedReader reader =
                new BufferedReader(
                        new InputStreamReader(System.in));
        System.out.println("Enter some numbers: ");
        List<String> firstList = Arrays.stream(reader.readLine().split("\\s+"))
                .collect(Collectors.toList());

        System.out.println("Enter some more numbers: ");
        List<String> secondList = Arrays.stream(reader.readLine().split("\\s+"))
                .collect(Collectors.toList());

        int size = Math.min(firstList.size(), secondList.size());


        List<String> newList = new ArrayList<>();

        for (int i = 0; i < size; i++) {
            newList.add(firstList.get(i));
            newList.add(secondList.get(i));
        }
    if (firstList.size() > secondList.size()){
        newList.addAll(firstList.subList(size, firstList.size()));
    } else {
        newList.addAll(secondList.subList(size, secondList.size()));
    }

        System.out.println(newList);
    }
}