diff --git a/_1_basics/src/main/java/code/_3_in_class/ClasaBunaZiua.java b/_1_basics/src/main/java/code/_3_in_class/ClasaBunaZiua.java
new file mode 100644
index 000000000..b091a8f9c
--- /dev/null
+++ b/_1_basics/src/main/java/code/_3_in_class/ClasaBunaZiua.java
@@ -0,0 +1,7 @@
+package code._3_in_class;
+
+public class ClasaBunaZiua {
+    public static void main(String[] args) {
+        System.out.println("Buna ziua");
+    }
+}
diff --git a/_1_basics/src/main/java/code/_3_in_class/Main.java b/_1_basics/src/main/java/code/_3_in_class/Main.java
index 3b87b4563..12bded29d 100644
--- a/_1_basics/src/main/java/code/_3_in_class/Main.java
+++ b/_1_basics/src/main/java/code/_3_in_class/Main.java
@@ -1,8 +1,43 @@
 package code._3_in_class;
 
+import java.sql.SQLOutput;
+
 public class Main {
 
     public static void main(String[] args) {
-        //TODO put your code changes in here
+        int[] ar = new int[]{1, 2, 3};
+        int[] v1 = copyArray(ar);
+        int[] v2 =copyArray(ar);
+        ar[0] = 10;
+        v1[0] = 100;
+        v2[0] = 1000;
+
+
+        displayVector("ar", ar);
+        displayVector("v1",v1);
+        displayVector("v2",v2);
+
+        String s="ABC";
+        System.out.println(s);
+        s="DEF";
+        System.out.println(s);
     }
+
+    private static int[] copyArray(int[]ar)
+    {
+        int[] copyArray=new int[ar.length];
+        for(int i=0;i<copyArray.length;i++)
+        {
+            copyArray[i]=ar[i];
+        }
+        return copyArray;
+    }
+    private static void displayVector(String name, int[] ar) {
+        System.out.print(name + " = ");
+        for (int i = 0; i < ar.length; i++) {
+            System.out.print(ar[i] + " ");
+        }
+        System.out.println();
+    }
+
 }
\ No newline at end of file
diff --git a/_3_design_patterns/src/main/java/code/_3_in_class/Main.java b/_3_design_patterns/src/main/java/code/_3_in_class/Main.java
index 3b87b4563..5801c95c5 100644
--- a/_3_design_patterns/src/main/java/code/_3_in_class/Main.java
+++ b/_3_design_patterns/src/main/java/code/_3_in_class/Main.java
@@ -3,6 +3,6 @@
 public class Main {
 
     public static void main(String[] args) {
-        //TODO put your code changes in here
+
     }
 }
\ No newline at end of file
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Address.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Address.java
new file mode 100644
index 000000000..0001a5d3f
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Address.java
@@ -0,0 +1,46 @@
+package clean.code.design_patterns.requirements;
+
+public class Address {
+    private String street;
+    private int number;
+    private String city;
+
+    public Address(String street, int number, String city) {
+        this.street = street;
+        this.number = number;
+        this.city = city;
+    }
+
+    public String getStreet() {
+        return street;
+    }
+
+    public void setStreet(String street) {
+        this.street = street;
+    }
+
+    public int getNumber() {
+        return number;
+    }
+
+    public void setNumber(int number) {
+        this.number = number;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("Address- ");
+        sb.append("Number: ").append(number);
+        sb.append(" Street: ").append(street);
+        sb.append(" City: ").append(city);
+        return sb.toString();
+    }
+}
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/BankTransfer.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/BankTransfer.java
new file mode 100644
index 000000000..a5b2ce1aa
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/BankTransfer.java
@@ -0,0 +1,9 @@
+package clean.code.design_patterns.requirements;
+
+public class BankTransfer implements PaymentMethod {
+    @Override
+    public void paySalary(float amount,Employee e) {
+        System.out.println("Employee "+e.getID()+" has received its salary ("+amount+") by using the Payment Method: Bank Transfer");
+    }
+
+}
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Department.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Department.java
new file mode 100644
index 000000000..df3bd8869
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Department.java
@@ -0,0 +1,5 @@
+package clean.code.design_patterns.requirements;
+
+public enum Department {
+    HR,Software,Hardware,QA,Security,DataWarehouse;
+}
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Employee.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Employee.java
new file mode 100644
index 000000000..cbb53bebb
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Employee.java
@@ -0,0 +1,140 @@
+package clean.code.design_patterns.requirements;
+
+public class Employee {
+    private String name;
+    private int ID;
+    private Department department;
+    private Function function;
+    private float salary;
+    private int managerID;
+    private Address address;
+    private boolean sentSalary;
+    private PaymentMethod method;
+
+    private Employee(Builder builder) {
+        this.name = builder.name;
+        this.ID = builder.ID;
+        this.department = builder.department;
+        this.function = builder.function;
+        this.salary = builder.salary;
+        this.managerID = builder.managerID;
+        this.address = builder.address;
+        this.sentSalary = builder.sentSalary;
+        this.method = builder.method;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getID() {
+        return ID;
+    }
+
+    public Department getDepartment() {
+        return department;
+    }
+
+    public Function getFunction() {
+        return function;
+    }
+
+    public float getSalary() {
+        return salary;
+    }
+
+    public int getManagerID() {
+        return managerID;
+    }
+
+    public Address getAddress() {
+        return address;
+    }
+
+    public void receiveSalary() {
+        if (method == null) {
+            System.out.println("The employee" + ID + " didn't choose any payment method for his salary");
+        } else if (!sentSalary) {
+            sentSalary = true;
+            method.paySalary(this.getSalary(), this);
+        } else {
+            System.out.println("Employee " + this.getID() + " has already received his salary this month");
+        }
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("Employee- ");
+        sb.append(" Name: ").append(name);
+        sb.append(" ID: ").append(ID);
+        if (department != null) {
+            sb.append(", Department: ").append(department);
+        }
+        if (function != null) {
+            sb.append(", Function: ").append(function);
+        }
+        sb.append(", Salary: ").append(salary);
+
+        return sb.toString();
+    }
+
+    public static class Builder {
+        private String name;
+        private int ID;
+        private Department department;
+        private Function function;
+        private float salary;
+        private int managerID;
+        private Address address;
+        private boolean sentSalary;
+        private PaymentMethod method;
+
+        public Builder(String name, int ID, float salary, Function function) {
+            this.name = name;
+            this.ID = ID;
+            this.salary = salary;
+            this.function = function;
+        }
+
+        public Builder setDepartment(Department department) {
+            this.department = department;
+            return this;
+        }
+
+        public Builder setFunction(Function function) {
+            this.function = function;
+            return this;
+        }
+
+        public Builder setSalary(float salary) {
+            this.salary = salary;
+            return this;
+        }
+
+        public Builder setManagerID(int managerID) {
+            this.managerID = managerID;
+            return this;
+        }
+
+        public Builder setAddress(Address address) {
+            this.address = address;
+            return this;
+        }
+
+        public Builder setSentSalary(boolean sentSalary) {
+            this.sentSalary = sentSalary;
+            return this;
+        }
+
+        public Builder setMethod(PaymentMethod method) {
+            this.method = method;
+            return this;
+        }
+
+        public Employee build() {
+            return new Employee(this);
+        }
+    }
+
+
+}
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Function.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Function.java
new file mode 100644
index 000000000..4ff4a9dfd
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Function.java
@@ -0,0 +1,5 @@
+package clean.code.design_patterns.requirements;
+
+public enum Function {
+    Intern,Junior,Mid,Senior,Director;
+}
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Main.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Main.java
index 8a9fccb7b..a802d966d 100644
--- a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Main.java
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Main.java
@@ -1,8 +1,69 @@
 package clean.code.design_patterns.requirements;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class Main {
 
     public static void main(String[] args) {
-        //TODO implement your design patterns in this package
+
+        List<Employee> employeeList=new ArrayList<>();
+        Employee e1 = new Employee.Builder("Rares", 1, 3500.45f, Function.Junior)
+                .setDepartment(Department.Software)
+                .setManagerID(2)
+                .setAddress(new Address("Calea Victoriei", 2, "Bucharest"))
+                .setMethod(new PayPal())
+                .build();
+        employeeList.add(e1);
+
+        Employee e2 = new Employee.Builder("Andrei", 2, 10000, Function.Senior)
+                .setDepartment(Department.Software)
+                .setAddress(new Address("Gheorghe Sincai", 1, "Bucharest"))
+                .setSentSalary(true)
+                .build();
+        employeeList.add(e2);
+
+        Employee e3 = new Employee.Builder("Marius", 3, 7500.52f, Function.Mid)
+                .setDepartment(Department.Hardware)
+                .setManagerID(2)
+                .build();
+        employeeList.add(e3);
+
+        Employee e4 = new Employee.Builder("Alex", 4, 3500, Function.Intern)
+                .setDepartment(Department.Hardware)
+                .setManagerID(3)
+                .setAddress(new Address("Calea Decebal", 3, "Bucharest"))
+                .setMethod(new PayPal())
+                .build();
+        employeeList.add(e4);
+
+        Employee e5 = new Employee.Builder("Tudor", 5, 5500.83f, Function.Junior)
+                .setDepartment(Department.Hardware)
+                .setManagerID(3)
+                .setSentSalary(true)
+                .setMethod(new BankTransfer())
+                .build();
+        employeeList.add(e5);
+
+        Employee e6 = new Employee.Builder("Ovidiu", 6, 20000, Function.Director)
+                .build();
+        employeeList.add(e6);
+
+        Employee e7 = new Employee.Builder("George", 7, 7000, Function.Junior)
+                .setDepartment(Department.Software)
+                .setManagerID(2)
+                .setSentSalary(true)
+                .setMethod(new Post())
+                .build();
+        employeeList.add(e7);
+
+        for(Employee e : employeeList){
+            System.out.println(e);
+        }
+
+        for(Employee e : employeeList){
+            e.receiveSalary();
+        }
+
     }
 }
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/PayPal.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/PayPal.java
new file mode 100644
index 000000000..4ab37ef26
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/PayPal.java
@@ -0,0 +1,8 @@
+package clean.code.design_patterns.requirements;
+
+public class PayPal implements PaymentMethod{
+    @Override
+    public void paySalary(float amount,Employee e) {
+        System.out.println("Employee "+e.getID()+" has received its salary ("+amount+") by using the Payment Method: PayPal");
+    }
+}
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/PaymentMethod.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/PaymentMethod.java
new file mode 100644
index 000000000..401511183
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/PaymentMethod.java
@@ -0,0 +1,5 @@
+package clean.code.design_patterns.requirements;
+
+public interface PaymentMethod {
+    void paySalary(float amount,Employee e);
+}
diff --git a/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Post.java b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Post.java
new file mode 100644
index 000000000..29670ebf6
--- /dev/null
+++ b/clean_code_projects/_2_project_requirements_design_patterns/src/main/java/clean/code/design_patterns/requirements/Post.java
@@ -0,0 +1,8 @@
+package clean.code.design_patterns.requirements;
+
+public class Post implements PaymentMethod{
+    @Override
+    public void paySalary(float amount,Employee e) {
+        System.out.println("Employee "+e.getID()+" has received its salary ("+amount+") by using the Payment Method: Post");
+    }
+}