diff --git a/Jerzy/Okno.java b/Jerzy/Okno.java
new file mode 100644
index 0000000..4fbef0e
--- /dev/null
+++ b/Jerzy/Okno.java
@@ -0,0 +1,24 @@
+package POB_2019.Jerzy;
+
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JButton;
+import java.awt.*;
+
+public class Okno extends JFrame {
+    public Okno(){
+        super("Moje okno");
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setPreferredSize(new Dimension(500,500));
+        setLocation(100,100);
+        setVisible(true);
+    }
+    @Override
+    public void paintComponents(Graphics g){
+        super.paintComponents(g);
+        Graphics g2 = (Graphics2D) g;
+        g2.drawOval(10,10, 490, 490);
+        g2.drawRect(100,100, 400, 400);
+        setVisible(true);
+    }
+}
\ No newline at end of file
diff --git a/Jerzy/main.java b/Jerzy/main.java
new file mode 100644
index 0000000..265d671
--- /dev/null
+++ b/Jerzy/main.java
@@ -0,0 +1,13 @@
+package POB_2019.Jerzy;
+
+import java.awt.EventQueue;
+
+public class main {
+    public static void main (String[] args){
+        EventQueue.invokeLater(new Runnable(){
+            public void run(){
+                new Okno();
+            }
+        }); 
+    }
+}
\ No newline at end of file
diff --git a/Kolokwium 15.04/a.out b/Kolokwium 15.04/a.out
new file mode 100755
index 0000000..1fd335c
Binary files /dev/null and b/Kolokwium 15.04/a.out differ
diff --git a/Kolokwium 15.04/kolo/geometry/Makefile b/Kolokwium 15.04/kolo/geometry/Makefile
new file mode 100644
index 0000000..7b19b32
--- /dev/null
+++ b/Kolokwium 15.04/kolo/geometry/Makefile	
@@ -0,0 +1,2 @@
+geometry: geometry.cpp
+	g++ --std=c++14 $< -o $@
diff --git a/Kolokwium 15.04/kolo/geometry/geometry.cpp b/Kolokwium 15.04/kolo/geometry/geometry.cpp
new file mode 100644
index 0000000..3a54b68
--- /dev/null
+++ b/Kolokwium 15.04/kolo/geometry/geometry.cpp	
@@ -0,0 +1,57 @@
+#include <iostream>
+#include <string>
+#include <cmath>
+#include <vector>
+using namespace std;
+
+class Geometry {
+    public:
+        virtual string type()=0;
+        virtual float  volume()=0;
+};
+
+class Box : public Geometry {
+    private:
+        int dimX, dimY, dimZ;
+    public:
+        Box(int _dimX, int _dimY, int _dimZ){
+            dimX=_dimX;
+            dimY=_dimY;
+            dimZ=_dimZ;
+        }
+        virtual string type(){
+            return "Box";
+        }
+        virtual float volume(){
+            return(dimX*dimZ*dimY);
+        }
+};
+
+class Ball : public Geometry {
+    private:
+        int radius;
+    public:
+        Ball(int _radius){
+            radius=_radius;
+        }
+        virtual string type(){
+            return "Ball";
+        }
+        virtual float volume(){
+            return (float)4/3*M_PI*pow(radius, 3);
+        }
+};
+
+int main()
+{
+	vector<Geometry*> geometries = {
+		(Geometry*)new Box(10, 2, 3),
+		(Geometry*)new Box(3, 3, 1),
+		(Geometry*)new Ball(5),
+		(Geometry*)new Ball(1)
+	};
+	for (Geometry *f : geometries) {
+		cout << f->type() << ": volume = " << f->volume() << "\n";
+	}
+	return 0;
+}
\ No newline at end of file
diff --git a/Kolokwium 15.04/kolo/parking/parking.py b/Kolokwium 15.04/kolo/parking/parking.py
new file mode 100644
index 0000000..ec0f496
--- /dev/null
+++ b/Kolokwium 15.04/kolo/parking/parking.py	
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+class Owner():
+    def __init__(self, _name, _surname):
+        self.name=_name
+        self.surname=_surname
+    def __str__(self):
+        return "%s %s" % (self.name, self.surname)
+
+class Car(Owner):
+    def __init__(self, _brand, _owner):
+        self.brand=_brand
+        self.owner=_owner
+    def __str__(self):
+        return "%s, %s %s" % (self.brand, self.owner.name, self.owner.surname)
+
+class Parking(Car):
+    def __init__(self, _parkingSpaces):
+        self.cars=[]
+        self.parkingSpaces=_parkingSpaces
+    def addCar(self, car):
+        if len(self.cars)>=self.parkingSpaces:
+            return;
+        else:
+            self.cars.append(car)
+    def removeCar(self, selectedCar):
+        if selectedCar in self.cars:
+            self.cars.remove(selectedCar)
+    def count(self):
+        return str(len(self.cars))
+    def freePlaces(self):
+        return str(self.parkingSpaces-len(self.cars))
+    def __str__(self):
+        sStream=''
+        sStream=sStream + str(len(self.cars)) + ' cars:\n'
+        for car in self.cars:
+            sStream=sStream + str(car) + '\n'
+        return sStream
+parking = Parking(3)
+
+owner1 = Owner("Jan", "Sienkiewicz")
+owner2 = Owner("Marek", "Kowalski")
+
+car1 = Car("Renault", owner1)
+car2 = Car("BMW", owner2)
+car3 = Car("Opel", owner1)
+car4 = Car("Mercedes", owner1)
+
+parking.addCar(car1)
+parking.addCar(car2)
+parking.addCar(car3)
+parking.addCar(car4)
+parking.removeCar(car3)
+parking.addCar(car4)
+
+print(parking)
\ No newline at end of file
diff --git a/Kolokwium 15.04/kolo/s444409_kol.zip b/Kolokwium 15.04/kolo/s444409_kol.zip
new file mode 100644
index 0000000..aee2bbc
Binary files /dev/null and b/Kolokwium 15.04/kolo/s444409_kol.zip differ
diff --git a/Kolokwium 15.04/zad1 b/Kolokwium 15.04/zad1
new file mode 100755
index 0000000..1fd335c
Binary files /dev/null and b/Kolokwium 15.04/zad1 differ
diff --git a/Kolokwium 15.04/zad1.cpp b/Kolokwium 15.04/zad1.cpp
new file mode 100644
index 0000000..3a54b68
--- /dev/null
+++ b/Kolokwium 15.04/zad1.cpp	
@@ -0,0 +1,57 @@
+#include <iostream>
+#include <string>
+#include <cmath>
+#include <vector>
+using namespace std;
+
+class Geometry {
+    public:
+        virtual string type()=0;
+        virtual float  volume()=0;
+};
+
+class Box : public Geometry {
+    private:
+        int dimX, dimY, dimZ;
+    public:
+        Box(int _dimX, int _dimY, int _dimZ){
+            dimX=_dimX;
+            dimY=_dimY;
+            dimZ=_dimZ;
+        }
+        virtual string type(){
+            return "Box";
+        }
+        virtual float volume(){
+            return(dimX*dimZ*dimY);
+        }
+};
+
+class Ball : public Geometry {
+    private:
+        int radius;
+    public:
+        Ball(int _radius){
+            radius=_radius;
+        }
+        virtual string type(){
+            return "Ball";
+        }
+        virtual float volume(){
+            return (float)4/3*M_PI*pow(radius, 3);
+        }
+};
+
+int main()
+{
+	vector<Geometry*> geometries = {
+		(Geometry*)new Box(10, 2, 3),
+		(Geometry*)new Box(3, 3, 1),
+		(Geometry*)new Ball(5),
+		(Geometry*)new Ball(1)
+	};
+	for (Geometry *f : geometries) {
+		cout << f->type() << ": volume = " << f->volume() << "\n";
+	}
+	return 0;
+}
\ No newline at end of file
diff --git a/Kolokwium 15.04/zad2.py b/Kolokwium 15.04/zad2.py
new file mode 100644
index 0000000..ec0f496
--- /dev/null
+++ b/Kolokwium 15.04/zad2.py	
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+class Owner():
+    def __init__(self, _name, _surname):
+        self.name=_name
+        self.surname=_surname
+    def __str__(self):
+        return "%s %s" % (self.name, self.surname)
+
+class Car(Owner):
+    def __init__(self, _brand, _owner):
+        self.brand=_brand
+        self.owner=_owner
+    def __str__(self):
+        return "%s, %s %s" % (self.brand, self.owner.name, self.owner.surname)
+
+class Parking(Car):
+    def __init__(self, _parkingSpaces):
+        self.cars=[]
+        self.parkingSpaces=_parkingSpaces
+    def addCar(self, car):
+        if len(self.cars)>=self.parkingSpaces:
+            return;
+        else:
+            self.cars.append(car)
+    def removeCar(self, selectedCar):
+        if selectedCar in self.cars:
+            self.cars.remove(selectedCar)
+    def count(self):
+        return str(len(self.cars))
+    def freePlaces(self):
+        return str(self.parkingSpaces-len(self.cars))
+    def __str__(self):
+        sStream=''
+        sStream=sStream + str(len(self.cars)) + ' cars:\n'
+        for car in self.cars:
+            sStream=sStream + str(car) + '\n'
+        return sStream
+parking = Parking(3)
+
+owner1 = Owner("Jan", "Sienkiewicz")
+owner2 = Owner("Marek", "Kowalski")
+
+car1 = Car("Renault", owner1)
+car2 = Car("BMW", owner2)
+car3 = Car("Opel", owner1)
+car4 = Car("Mercedes", owner1)
+
+parking.addCar(car1)
+parking.addCar(car2)
+parking.addCar(car3)
+parking.addCar(car4)
+parking.removeCar(car3)
+parking.addCar(car4)
+
+print(parking)
\ No newline at end of file
diff --git a/POB_Java/Employee.class b/POB_Java/Employee.class
new file mode 100644
index 0000000..ed1893a
Binary files /dev/null and b/POB_Java/Employee.class differ
diff --git a/POB_Java/Employee.java b/POB_Java/Employee.java
new file mode 100644
index 0000000..3e008c4
--- /dev/null
+++ b/POB_Java/Employee.java
@@ -0,0 +1,45 @@
+import java.io.*;
+public class Employee {
+
+   String name;
+   int age;
+   String designation;
+   double salary;
+
+   // This is the constructor of the class Employee
+   public Employee(String name) {
+      this.name = name;
+   }
+
+   // Assign the age of the Employee  to the variable age.
+   public void empAge(int empAge) {
+      age = empAge;
+   }
+
+   /* Assign the designation to the variable designation.*/
+   public void empDesignation(String empDesig) {
+      designation = empDesig;
+   }
+
+   /* Assign the salary to the variable	salary.*/
+   public void empSalary(double empSalary) {
+      salary = empSalary;
+   }
+
+   /* Print the Employee details */
+   public void printEmployee() {
+      System.out.println("Name:"+ name );
+      System.out.println("Age:" + age );
+      System.out.println("Designation:" + designation );
+      System.out.println("Salary:" + salary);
+   }
+   public void compare(Employee emp){
+       if(emp.salary > this.salary){
+           System.out.println("Second employee earns more.");
+       } else if (emp.salary < this.salary){
+           System.out.println("First employee earns more.");
+       } else {
+           System.out.println("Both employees earn the same ammount.");
+       }
+   }
+}
\ No newline at end of file
diff --git a/POB_Java/Employee_main.class b/POB_Java/Employee_main.class
new file mode 100644
index 0000000..e161e47
Binary files /dev/null and b/POB_Java/Employee_main.class differ
diff --git a/POB_Java/Employee_main.java b/POB_Java/Employee_main.java
new file mode 100644
index 0000000..b05038b
--- /dev/null
+++ b/POB_Java/Employee_main.java
@@ -0,0 +1,10 @@
+public class Employee_main{
+    public static void main(String []args){
+        Employee emp1=new Employee("Marcin");
+        emp1.salary=1500;
+        Employee emp2=new Employee("Tomasz");
+        emp2.salary=1900;
+        emp1.compare(emp2);
+
+    }
+}
\ No newline at end of file
diff --git a/zad7_1 b/zad7_1
new file mode 100755
index 0000000..c9c2160
Binary files /dev/null and b/zad7_1 differ
diff --git a/zad7_1.cpp b/zad7_1.cpp
new file mode 100644
index 0000000..7dced9e
--- /dev/null
+++ b/zad7_1.cpp
@@ -0,0 +1,59 @@
+#include <iostream>
+#include <string>
+#include <sstream>
+
+using namespace std;
+
+class Vec2 {
+    private:
+        int x,y;
+    public:
+        Vec2(int _x, int _y){
+            x=_x;
+            y=_y;
+        }
+        string toString(){
+            stringstream s;
+            s << "[" << x << ", " << y << "]";
+            return s.str();
+        }
+        friend Vec2 operator+(const Vec2& vec1, const Vec2& vec2){
+            return Vec2(vec1.x+vec2.x, vec1.y+vec2.y);
+        }
+        friend Vec2 operator-(const Vec2& vec1, const Vec2& vec2){
+            return Vec2(vec1.x-vec2.x, vec1.y-vec2.y);
+        }
+        Vec2& operator+=(const Vec2& vec){
+            x=vec.x+x;
+            y=vec.y+y;
+            return *this;
+        }
+        Vec2& operator-=(const Vec2& vec){
+            x=vec.x-x;
+            y=vec.y-y;
+            return *this;
+        }
+        friend float operator*(const Vec2& vec1, const Vec2& vec2){
+            return (float)vec1.x*vec2.x + (float)vec1.y+vec2.y;
+        }
+        bool operator==(const Vec2& vec){
+            if(x==vec.x && y==vec.y) return 1;
+            else return 0;
+        }
+        bool operator!=(const Vec2& vec){
+            if(x==vec.x && y==vec.y) return 0;
+            else return 1;
+        }
+};
+
+int main(){
+    Vec2 vec1 = Vec2(5,1);
+    Vec2 vec2 = Vec2(3,4);
+    Vec2 vec3 = vec1 + vec2;
+    cout << vec3.toString() << endl;
+    vec3+=vec2;
+    cout << vec3.toString() << endl;
+    vec3-=vec1;
+    cout << vec3.toString() << endl;
+    cout << vec3*vec2 << endl;
+}
\ No newline at end of file
diff --git a/zad7_2.cpp b/zad7_2.cpp
new file mode 100644
index 0000000..60aa8f7
--- /dev/null
+++ b/zad7_2.cpp
@@ -0,0 +1,34 @@
+#include <iostream>
+#include <string>
+#include <sstream>
+
+using namespace std;
+
+template <typename num>
+class Vec2 {
+    private:
+        num x,y;
+    public:
+        Vec2(num _x, num _y){
+            x=_x;
+            y=_y;
+        }
+        string toString(){
+            stringstream s;
+            s << "[" << x << ", " << y << "]";
+            return s.str();
+        }
+        Vec2 add(const Vec2& vec){
+            return Vec2(x+vec.x, y+vec.y);
+        }
+        num multiply(const Vec2& vec){
+            return (float)x*vec.x + (float)y*vec.y;
+        }
+};
+
+int main(){
+    Vec2<float> vec1 = Vec2<float>(5.5f,1.2f);
+    Vec2<float> vec2 = Vec2<float>(3.4f,4.2f);
+    Vec2<float> vec3 = vec1.add(vec2);
+    cout << vec3.toString() << endl;
+}
\ No newline at end of file