ArrayList, LinkedList, Vector

ArrayListは動的配列拡張
LinkedListは数珠繋ぎ
Vectorはthread safe

public class Outer {
    public static void main(String args[]) {
        List<String> l = new ArrayList<>();
        l.add("A");
        l.add("B");
        l.add("C");
        l.forEach(System.out::println);
        Consumer con = x -> System.out.println("--------");
        con.accept(null);
        l.parallelStream().forEach(System.out::println);
        con.accept(null);
        List<String> l2 = new LinkedList<>();
        l2.add("A");
        l2.add("B");
        l2.add("C");
        l2.forEach(System.out::println);
        con.accept(null);
        l2.parallelStream().forEach(System.out::println);
        Vector<String> v = new Vector<>();
        con.accept(null);
        v.add("A");
        v.add("B");
        v.add("C");
        v.forEach(System.out::println);
        con.accept(null);
        v.parallelStream().forEach(System.out::println);   //thread safe
    }
}

A
B
C
--------
B
C
A
--------
A
B
C
--------
B
C
A
--------
A
B
C
--------
B
C
A