HashSet、LinkedHashSet、TreeSet 简明解释

public static void main(String[] args) {
        
        System.out.println("####################HashSet Start####################");
        Set<String> setHash=new HashSet<String>();
        setHash.add("a");
        setHash.add("e");
        setHash.add("c");
        setHash.add("d");
        setHash.add("b");
        for (Object object : setHash) {
            System.out.print(object+" ");
        }
        System.out.println("\n####################HashSet End####################");
        System.out.println("\n####################LinkedHashSet Start####################");
        Set<String> setLinked=new LinkedHashSet<String>();
        setLinked.add("a");
        setLinked.add("e");
        setLinked.add("c");
        setLinked.add("d");
        setLinked.add("b");
        for (Object object : setLinked) {
            System.out.print(object+" ");
        }
        System.out.println("\n####################LinkedHashSet End####################");
        System.out.println("\n####################TreeSet Start####################");
        Set<String> setTree=new TreeSet<String>();
        setTree.add("a");
        setTree.add("e");
        setTree.add("c");
        setTree.add("d");
        setTree.add("b");
        for (Object object : setTree) {
            System.out.print(object+" ");
        }
        System.out.println("\n####################TreeSet End####################");
    }