added student.java

src/main/java/com/thealgorithms/student/Calculator.java

@@ -0,0 +1,15 @@
+// Advanced Calculator with error handling
+public class Calculator {
+    public double add(double a, double b) {
+        return a + b;
+    }
+
+    public double subtract(double a, double b) {
+        return a - b;
+    }
+
+    // Add more methods to create more significant differences
+    public String getVersion() {
+        return "Calculator v2.0";
+    }
+}

src/main/java/com/thealgorithms/student/Grade.java

@@ -0,0 +1,7 @@
+public class Grade {
+    public int id;
+    public String name;
+    public float cgpa;
+
+    public void show(){}
+}

src/main/java/com/thealgorithms/student/Student.java

@@ -0,0 +1,18 @@
+
+public class Student {
+    public String name;
+    private  int ID;
+    public double cgpa;
+
+    public Student() {
+        this.name= "";
+        this.ID=0;
+        this.cgpa=0.0;
+    }
+    public Student(String name,int id,double cgpa){
+        this.name = name;
+        ID= id;
+        this.cgpa=cgpa;
+    }
+
+}