结果错误，应为43210

[ZDCaesar]

JavaGuide/docs/java/new-features/java21.md

Line 201 in 76e4dba

System.out.println(linkedHashSet.reversed()); //Prints [5, 3, 2, 1, 0]

[Snailclimb]

JavaGuide/docs/java/new-features/java21.md

Line 201 in 76e4dba

System.out.println(linkedHashSet.reversed()); //Prints [5, 3, 2, 1, 0]

感谢指出，这里笔误了：

LinkedHashSet<Integer> linkedHashSet = new LinkedHashSet<>(List.of(1, 2, 3));

Integer firstElement = linkedHashSet.getFirst();   // 1
Integer lastElement = linkedHashSet.getLast();    // 3

linkedHashSet.addFirst(0);  //List contains: [0, 1, 2, 3]
linkedHashSet.addLast(4);   //List contains: [0, 1, 2, 3, 4]

System.out.println(linkedHashSet.reversed());   //Prints [4, 3, 2, 1, 0]