java - sort

Java/Data Structures/Java Sort/Solution.java

@@ -0,0 +1,64 @@
+import java.util.*;
+
+class Student{
+    private int id;
+    private String fname;
+    private double cgpa;
+    public Student(int id, String fname, double cgpa) {
+        super();
+        this.id = id;
+        this.fname = fname;
+        this.cgpa = cgpa;
+    }
+    public int getId() {
+        return id;
+    }
+    public String getFname() {
+        return fname;
+    }
+    public double getCgpa() {
+        return cgpa;
+    }
+}
+
+class SortResult implements Comparator<Student>{
+    public int compare(Student a, Student b){
+        if(a.getCgpa() == b.getCgpa()){
+            if(a.getFname().equals(b.getFname()))
+                return (a.getId() < b.getId() ? 1 : -1);
+            else
+                return a.getFname().compareTo(b.getFname());
+        }
+        else{
+            return (a.getCgpa() < b.getCgpa() ? 1 : -1);
+        }
+    }
+}
+
+public class Solution {
+    public static void main(String[] args){
+        Scanner in = new Scanner(System.in);
+        int testCases = Integer.parseInt(in.nextLine());
+
+        List<Student> studentList = new ArrayList<Student>();
+        while(testCases > 0){
+            int id = in.nextInt();
+            String fname = in.next();
+            double cgpa = in.nextDouble();
+
+            Student st = new Student(id, fname, cgpa);
+            studentList.add(st);
+
+            testCases--;
+        }
+        SortResult sorter = new SortResult();
+        Collections.sort(studentList, sorter);
+          for(Student st: studentList){
+            System.out.println(st.getFname());
+        }
+    }
+}
+
+
+
+