diff --git a/Student.java b/Student.java
new file mode 100644
index 0000000..045aa7c
--- /dev/null
+++ b/Student.java
@@ -0,0 +1,27 @@
+public class Student {
+    private String name;
+    private int grade;
+
+    // Constructor
+    public Student(String name, int grade) {
+        this.name = name;
+        this.grade = grade;
+    }
+
+    // Getters and setters
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getGrade() {
+        return grade;
+    }
+
+    public void setGrade(int grade) {
+        this.grade = grade;
+    }
+}
diff --git a/hashmap.java b/hashmap.java
new file mode 100644
index 0000000..2c3d377
--- /dev/null
+++ b/hashmap.java
@@ -0,0 +1,14 @@
+import java.util.HashMap;
+import java.util.Map;
+
+public class Main {
+    public static void main(String[] args) {
+        // Create a Map with student names as keys and Student objects as values
+        Map<String, Student> studentMap = new HashMap<>();
+        // Add students to the map
+        studentMap.put("Alice", new Student("Alice", 85));
+        studentMap.put("Bob", new Student("Bob", 70));
+        studentMap.put("Charlie", new Student("Charlie", 95));
+        studentMap.put("David", new Student("David", 80));
+    }
+}
diff --git a/hashmap1.java b/hashmap1.java
new file mode 100644
index 0000000..84caa37
--- /dev/null
+++ b/hashmap1.java
@@ -0,0 +1,22 @@
+public class Main {
+    public static void main(String[] args) {
+        // Create and populate the student map
+        Map<String, Student> studentMap = new HashMap<>();
+        studentMap.put("Alice", new Student("Alice", 85));
+        studentMap.put("Bob", new Student("Bob", 70));
+        studentMap.put("Charlie", new Student("Charlie", 95));
+        studentMap.put("David", new Student("David", 80));
+
+        // Increase grades by 10%
+        Map<String, Student> updatedMap = increaseGrades(studentMap);
+    }
+
+    public static Map<String, Student> increaseGrades(Map<String, Student> studentMap) {
+        for (Map.Entry<String, Student> entry : studentMap.entrySet()) {
+            Student student = entry.getValue();
+            int increasedGrade = (int) (student.getGrade() * 1.1); // Increase by 10%
+            student.setGrade(increasedGrade);
+        }
+        return studentMap;
+    }
+}