Sorting objects in Java comparator

Java introduced lambda expressions and streams after 8, making the sorting method change

Class User {int id;    String name;        public User (int ID, String name) {this.id = ID;    THIS.name = name;    } public int getId () {return id;    } public String GetName () {return name;    } @Override Public String toString () {return "user{" + "id=" + ID + ", name= ' + name + ' \ ' + '} ';        }}list<string> words = arrays.aslist ("566ggg", "ce", "ddd", "DC", "CDs", "CeCe"); Use the Sort method of list Words.sort (Comparator.comparingint (string::length). thencomparing (String.case_insensitive_order        )));        SYSTEM.OUT.PRINTLN (words);        Use the Collections tool class three methods equivalent to Collections.sort (words, (s1, S2)-Integer.compare (S1.length (), S2.length ()));        Collections.sort (words, comparator.comparing (Word-word.length ()));                Collections.sort (words, new comparator<string> () {public int compare (string s1, string s2) {            Return Integer.compare (S1.length (), s2.length ());     }   });        SYSTEM.OUT.PRINTLN (words);        list<user> userlist = new arraylist<> ();        Userlist.add (New User ("Lili"));        Userlist.add (New User ("ABCD"));        Userlist.add (New User ("Bbde"));        Userlist.add (New User ("Cdef"));        Userlist.sort (Comparator.comparing (User::getid). thencomparing (User::getname)); System.out.println (userlist);

Output Result:

[ce, dc, cds, ddd, cece, 566ggg][ce, dc, cds, ddd, cece, 566ggg][User{id=41, name=‘bbde‘}, User{id=43, name=‘cdef‘}, User{id=45, name=‘abcd‘}, User{id=45, name=‘lili‘}]

Sorting objects in Java comparator