Ordered collection
null elements allowed
Duplicates elements allowed

LinkedList<String> ls = new LinkedList<>(); ls.add(null); ls.add("ccc"); ls.add("bbb"); ls.add("bbb"); ls.add("aaa"); ls.add("aaa"); ls.add("aaa"); ls.forEach(System.out::println);
Output: null ccc bbb bbb aaa aaa aaa

LinkedList<String> ls = new LinkedList<>(); ls.add("ccc"); ls.add("bbb"); ls.add("aaa"); Iterator<String> i = ls.iterator(); if (i.hasNext()) i.next(); i.remove(); // removes the last element returned: ccc ls.forEach(System.out::println);
Output: bbb aaa

LinkedList<String> ls = new LinkedList<>(); ls.add("ccc"); ls.add("bbb"); ls.add("aaa"); ListIterator<String> li = ls.listIterator(); ListIterator<String> li_copy = ls.listIterator(); if (li.hasNext()) li.next(); li.set("zzz"); // this will replace the value "ccc" li_copy.next(); // OK li.add("eee"); // li_copy.next(); // this will throw java.util.ConcurrentModificationException ls.forEach(System.out::println);
Output: zzz eee bbb aaa

LinkedList<String> ls = new LinkedList<>(); ls.add("c"); ls.add("bb"); ls.add("aaa"); Collections.sort(ls); // Objects must implement java.lang.Comparable<T> (Compiler error) System.out.println(Collections.binarySearch(ls, "aaa")); // Objects must implement java.lang.Comparable<T> (Compiler error) Collections.sort(ls, Comparator.comparing(String::length)); System.out.println(Collections.binarySearch(ls, "aaa", Comparator.comparing(String::length)));
Output: 0 2