└── java sort


/java sort:
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 1 | import java.util.*;
 2 | 
 3 | class Student implements Comparable<Student>{
 4 | 	private int id;
 5 | 	private String fname;
 6 | 	private double cgpa;
 7 | 	public Student(int id, String fname, double cgpa) {
 8 | 		super();
 9 | 		this.id = id;
10 | 		this.fname = fname;
11 | 		this.cgpa = cgpa;
12 | 	}
13 | 	public int getId() {
14 | 		return id;
15 | 	}
16 | 	public String getFname() {
17 | 		return fname;
18 | 	}
19 | 	public double getCgpa() {
20 | 		return cgpa;
21 | 	}
22 |     //============ code writen here===============
23 |     public int compareTo(Student s){
24 |         if(this.getCgpa()<s.getCgpa())return 1;
25 |         else if(this.getCgpa()==s.getCgpa()){
26 |             if(this.getFname().compareTo(s.getFname())==0){
27 |                 return this.getId()-s.getId();
28 |             }else return this.getFname().compareTo(s.getFname());
29 |         }else return -1;
30 |     }
31 | }
32 | 
33 | 
34 | public class Solution
35 | {
36 | 	public static void main(String[] args){
37 | 		Scanner in = new Scanner(System.in);
38 | 		int testCases = Integer.parseInt(in.nextLine());
39 | 		
40 | 		List<Student> studentList = new ArrayList<Student>();
41 | 		while(testCases>0){
42 | 			int id = in.nextInt();
43 | 			String fname = in.next();
44 | 			double cgpa = in.nextDouble();
45 | 			
46 | 			Student st = new Student(id, fname, cgpa);
47 | 			studentList.add(st);
48 | 			
49 | 			testCases--;
50 | 		}
51 | 	//calling sort method on studentList
52 |     Collections.sort(studentList);
53 |     
54 |       	for(Student st: studentList){
55 | 			System.out.println(st.getFname());
56 | 		}
57 | 	}
58 |     
59 |     
60 | }
61 | 


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