diff --git a/Screenshot_2024-05-15-23-29-31-532_com.android.chrome.jpg b/Screenshot_2024-05-15-23-29-31-532_com.android.chrome.jpg
new file mode 100644
index 0000000..bb1e323
Binary files /dev/null and b/Screenshot_2024-05-15-23-29-31-532_com.android.chrome.jpg differ
diff --git a/exercise1/Human.java b/exercise1/HumaN.java
similarity index 92%
rename from exercise1/Human.java
rename to exercise1/HumaN.java
index 4b9b45e..dae8469 100644
--- a/exercise1/Human.java
+++ b/exercise1/HumaN.java
@@ -17,7 +17,7 @@ public void sayMyName() {
         System.out.println("im a human!");
     }
 
-    public void staticPrint() {
+    public static final void staticPrint() {
         System.out.println("this function should always print this string in all subclasses");
     }
 }
diff --git a/exercise1/Main.java b/exercise1/Main.java
index ad47473..0eee412 100644
--- a/exercise1/Main.java
+++ b/exercise1/Main.java
@@ -13,6 +13,23 @@
  
 public class Main {
     public static void main(String[] args) {
+      public static void main(String[] args) {
+     Human student = new Student();
+     Human professor = new Professor();
+
+System.out.println(student instanceof Human); // true
+System.out.println(professor instanceof Human); // true
+ Human human = new Student();
+ human.sayMyName(); 
+       /* خروجی: +SayMyName
+        - null
+        +You are GODDAMN right. */
+
+       Human human = new Professor();
+       human.sayMyName(); // خروجی: My name is: null, I am from null
+
+       
+    }
 
     }
 }
diff --git a/exercise1/ProfessoR.java b/exercise1/ProfessoR.java
new file mode 100644
index 0000000..5f093fa
--- /dev/null
+++ b/exercise1/ProfessoR.java
@@ -0,0 +1,42 @@
+package exercise1;
+
+// Implement or extend the human class to make a professor class...
+//  4.Add the following attributes to this class with setters and getters: professorSpecialty, professorFaculty, numberOfCourse
+//  5.Change the professor class so that when we call the sayMyName() method on an instance of this class, fullName of the professor plus their professorFaculty is printed.
+ 
+public class Professor extends Human {
+ private String professorFaculty;
+private int numberOfCourse;
+private String professorSpecialty;
+
+
+public void setProfessorFaculty(String professorFaculty) {
+    this.professorFaculty = professorFaculty;
+}
+
+public void setNumberOfCourse(int numberOfCourse) {
+    this.numberOfCourse = numberOfCourse;
+}
+
+public void setProfessorSpecialty(String professorSpecialty) {
+    this.professorSpecialty = professorSpecialty;
+}
+
+
+public String getProfessorFaculty() {
+    return professorFaculty;
+}
+
+public int getNumberOfCourse() {
+    return numberOfCourse;
+}
+
+public String getProfessorSpecialty() {
+    return professorSpecialty;
+}
+    @Override
+    public void sayMyName() {
+        System.out.println("My name is: " + getFullName() + ", I am from " + professorFaculty);
+    }
+
+}
diff --git a/exercise1/Professor.java b/exercise1/Professor.java
deleted file mode 100644
index 7c3b522..0000000
--- a/exercise1/Professor.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package exercise1;
-
-// Implement or extend the human class to make a professor class...
-//  4.Add the following attributes to this class with setters and getters: professorSpecialty, professorFaculty, numberOfCourse
-//  5.Change the professor class so that when we call the sayMyName() method on an instance of this class, fullName of the professor plus their professorFaculty is printed.
- 
-public class Professor {
-}
diff --git a/exercise1/StudenT.java b/exercise1/StudenT.java
new file mode 100644
index 0000000..57cdb4b
--- /dev/null
+++ b/exercise1/StudenT.java
@@ -0,0 +1,52 @@
+package exercise1;
+
+// Human is an abstract concept, so we have created an abstract class to represent it...
+// Implement or extend the Human class to make a student class.
+// 2. Change the student class so that when we call the sayMyName() method on an instance of this class, the fullName attribute of the student is printed.
+// 3.Add the following attributes to the student class with setters and getters: studentNumber, majorName, universityName
+
+public class Student extends Human {
+    private String studentNumber;
+    private String majorName;
+    private String universityName;
+
+    public Student(String fullName) {
+        super(fullName);
+    }
+
+  
+    public void setStudentNumber(String studentNumber) {
+        this.studentNumber = studentNumber;
+    }
+
+    public String getStudentNumber() {
+        return studentNumber;
+    }
+
+    public void setMajorName(String majorName) {
+        this.majorName = majorName;
+    }
+
+    public String getMajorName() {
+        return majorName;
+    }
+
+    public void setUniversityName(String universityName) {
+        this.universityName = universityName;
+    }
+
+    public String getUniversityName() {
+        return universityName;
+    }
+
+    
+    @Override
+    public void sayMyName() {
+        System.out.println("+SayMyName");
+        System.out.println("-" + getFullName());
+        System.out.println("+You are GODDAMN right.");
+    }
+}
+/* 
+https://youtube.com/shorts/UHSDllBVFOg?si=C5Dn0CDQPZUPmf03
+*/
diff --git a/exercise1/Student.java b/exercise1/Student.java
deleted file mode 100644
index 0f8f606..0000000
--- a/exercise1/Student.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package exercise1;
-
-// Human is an abstract concept, so we have created an abstract class to represent it...
-// Implement or extend the Human class to make a student class.
-// 2. Change the student class so that when we call the sayMyName() method on an instance of this class, the fullName attribute of the student is printed.
-// 3.Add the following attributes to the student class with setters and getters: studentNumber, majorName, universityName
-
-public class Student {
-}