Java8 # NumberStartWithOne

 import java.util.Arrays;

import java.util.List;

public class NumberStartingWithOne {
    public static void main(String[] args) {
        List<Integer> mylist = Arrays.asList(11, 12, 23, 10);
        mylist.stream()
                .map(n -> n +"") // Convert Interger to String
                .filter(s -> s.startsWith("1"))
                .forEach(System.out::println);
    }
}