HashSet /LinkedHashSet/TreeSet排序的不同

HashSet set1 = new HashSet(Arrays.asList("b c e f g a".split(" ")));
LinkedHashSet set2 = new LinkedHashSet(Arrays.asList("b c e f g a".split(" ")));
SortedSet set3 = new TreeSet(Arrays.asList("b c e f g a".split(" ")));
System.out.println(set1);
System.out.println(set2);
System.out.println(set3);

输出结果为：

[f, g, e, b, c, a]

[b, c, e, f, g, a]

[a, b, c, e, f, g]

HashSet按Hash函数排序

LinkedHashSet按插入顺序排序

TreeSet按字母顺序排序