OOPS - designing of student management

devwithsumit · devwithsumit · commit 3b807b20fbcb · 2024-12-24T14:18:05.000+05:30
diff --git a/src/OOPS/Student.java b/src/OOPS/Student.java
@@ -4,23 +4,23 @@ public class Student {
     int age;
     String name;
 
-/*  *** this is compulsory in case of conflict
-    Means - without this keyword it will target the nearest variable
-    with this keyword it will target only the data members/attributes/instance fields. */
+    /*  *** this keyword is compulsory in case of conflict
+    Means - without this keyword it will target the nearest variable.
+    With this keyword it will target only the data members/attributes/instance fields. */
 
 
-    //    initialization via method
+    // initialization via method
     void init(String n, int a) {
         this.name = n;
         this.age = a;
     }
-//    compile time polymorphism
-    //constructor overloading
+    // compile time polymorphism
+    // constructor overloading
     Student(){
 
     }
 
-    //    constructor initialisation
+    // constructor initialisation
     Student(String n, int a) {
         this.name = n;
         this.age = a;
diff --git a/src/OOPS/StudentManagement.java b/src/OOPS/StudentManagement.java
@@ -0,0 +1,65 @@
+package OOPS;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.HashMap;
+import java.util.Map;
+
+public class StudentManagement {
+    public static class Student{
+        int studentId;
+        String name;
+        int age;
+        String grade;
+        HashMap<String, Integer> marks = new HashMap<>();
+        double percentage;
+        void accept() throws IOException {
+            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+            System.out.println("Enter student id: ");
+            studentId = Integer.parseInt(br.readLine());
+            System.out.println("Enter name: ");
+            name = br.readLine();
+            System.out.println("Enter age: ");
+            age = Integer.parseInt(br.readLine());
+            System.out.println("Enter grade: ");
+            grade = br.readLine();
+            System.out.println("Enter marks of Maths: ");
+            int mathsMarks = Integer.parseInt(br.readLine());
+            System.out.println("Enter marks of English: ");
+            int englishMarks = Integer.parseInt(br.readLine());
+            System.out.println("Enter marks of Science: ");
+            int scienceMarks = Integer.parseInt(br.readLine());
+            marks.put("Maths: ", mathsMarks);
+            marks.put("English: ", englishMarks);
+            marks.put("Science: ", scienceMarks);
+        }
+
+        void calculate(){
+            int sum = 0;
+            int noOfSubs = 0;
+            for (Map.Entry<String, Integer> e: marks.entrySet()){
+                sum += e.getValue();
+                noOfSubs++;
+            }
+            percentage = (double) sum /noOfSubs;
+        }
+        void display(){
+            System.out.println("Student Id: " + studentId);
+            System.out.println("Name: " + name);
+            System.out.println("Age: " + age);
+            System.out.println("Grade: " + grade);
+            System.out.println("Marks :-");
+            for(var e: marks.entrySet()){
+                System.out.println(e.getKey() + ": " + e.getValue());
+            }
+            System.out.printf("percentage: %.2f", percentage);
+        }
+    }
+    public static void main(String[] args) throws IOException {
+        Student s1 = new Student();
+        s1.accept();
+        s1.calculate();
+        s1.display();
+    }
+}
