Sorting in Custom TreeSet

The first example of code:

Public class user implements comparable<user> {    private  String name;    private int age;    private  Int ordernumber;    public user (String name, int age, int  ordernumber)  {        this.name = name;         this.age = age;         this.orderNumber = orderNumber;    }    public  String getname ()  {        return name;     }    public void setname (String name)  {         this.name = name;    }     Public int getage () &NBsp {        return age;    }     public void setage (int age)  {         This.age = age;    }    public int getordernumber ( )  {        return ordernumber;    }     public void setordernumber (Int ordernumber)  {         this.orderNumber = orderNumber;    }      @Override     public int compareto (user other)  {         if  (This.getordernumber ()  == other.getordernumber ())  {            return this.getage ()   - other.getage ();         }        return  This.getordernumber ()  - other.getordernumber ();     }    @ Override    public string tostring ()  {         return  "User [name="  + name +  " age="  + age +   ",  ordernumber="  + orderNumber +  "]";     }}

The second example of code:

public class student {    private string name;     private int score;    public student (String name, int  Score)  {        super ();         this.name = name;        this.score =  score;    }     @Override     public string  tostring ()  {        return  "Student [name="   + name +  ",  score="  + score +  "]";    }     public string getname ()  {         Return name;    }    public void setname (String  Name)  {        this.name = name;    }     Public int getscore ()  {        return score;     }    public void setscore (Int score)  {         this.score = score;    }}public class  StudentComparator implements Comparator<Student>{     @Override      public int compare (STUDENT&NBSP;S1,&NBSP;STUDENT&NBSP;S2)  {         return s2.getscore ()  - s1.getscore ();     }}

Test the code (the first and second are written together):

Public class testtreeset {    public static void main (String [] args)  {        TreeSet<User> set =  New treeset<> ();         user user1 = new  user ("Tom",  25, 3);         user user2 =  new user ("Jack",  28, 2);         user user3  = new user ("Mike",  20, 3);        user  User4 = new user ("John",  30, 1);         user  user5 = new user ("Jill",  50, 0);                 set.add (user1);         set.add (User2);        set.add (User3);         Set.add (USER4);         set.add (USER5);      &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;SYSTEM.OUT.PRINTLN (SET);                          Set<Student> studens = new TreeSet<> (new  Studentcomparator ());        student s1 = new  Student ("Tom",  80);        student s2 = new  Student ("Jack",  95);        student s3 = new  Student ("Mike",  60);        student s4 = new  Student ("John",  75);   &nbSp;     student s5 = new student ("Jill",  100);                 studens.add (S1);         studens.add (S2);         Studens.add (S3);         studens.add (S4);         studens.add (S5);                 system.out.println (studens);     }}

Sorting in Custom TreeSet