I dont no why we most writh javadoc i,m dead now

src/Alibaba/System.java

+package Alibaba;
+
+import java.util.ArrayList;
+
+/**
+ * System of airport 
+ * @author mohammadreza
+ * @version
+ */
+public class System {
+    private ArrayList<Flight> flights;
+    private ArrayList<Ticket> tickets;
+    
+    /**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the flights
+	 */
+	public ArrayList<Flight> getFlights() {
+		return flights;
+	}
+	/**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the tickets
+	 */
+	public ArrayList<Ticket> getTickets() {
+		return tickets;
+	}
+	/**
+	 * for add a flight to users flight list
+	 * @author mohammadreza
+	 * @param Flight add to flight list
+	 */
+    public void addFlight(Flight f){
+        flights.add(f);
+    }
+    /**
+	 * for remove a flight from users flight list
+	 * @author mohammadreza
+	 * @param Flight remove from flight list
+	 */
+    public void removeFlight(Flight f){
+        flights.remove(f);
+    }
+    public void addTicket(Ticket t){
+        tickets.add(t);
+    }
+    public void showFlightsDetails(){
+        for(Flight f: flights){
+            java.lang.System.out.println(f.getCompany()+","+f.getDay()+","+f.getHour()+","+f.getI()+","+f.getF()+","+f.getNumber() );
+        }
+    }
+}

src/Alibaba/Ticket.java

+package Alibaba;
+
+/**
+ * Ticket class modeling the airplane ticket
+ * @author mohammadreza
+ * @version 1.0
+ */
+public class Ticket {
+    private int id;
+    private int flightNum;
+    private int cargo;
+    private boolean food;
+	/**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the id
+	 */
+	public int getId() {
+		return id;
+	}
+	/**
+	 * this is a setter method
+	 * @author mohammadreza
+	 * @param id the id to set
+	 */
+	public void setId(int id) {
+		this.id = id;
+	}
+	/**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the flightNum
+	 */
+	public int getFlightNum() {
+		return flightNum;
+	}
+	/**
+	 * this is a setter method
+	 * @author mohammadreza
+	 * @param flightNum the flightNum to set
+	 */
+	public void setFlightNum(int flightNum) {
+		this.flightNum = flightNum;
+	}
+	/**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the cargo
+	 */
+	public int getCargo() {
+		return cargo;
+	}
+	/**
+	 * this is a setter method
+	 * @author mohammadreza
+	 * @param cargo the cargo to set
+	 */
+	public void setCargo(int cargo) {
+		this.cargo = cargo;
+	}
+	/**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the food
+	 */
+	public boolean isFood() {
+		return food;
+	}
+	/**
+	 * this is a setter method
+	 * @author mohammadreza
+	 * @param food the food to set
+	 */
+	public void setFood(boolean food) {
+		this.food = food;
+	}
+
+}

src/Alibaba/User.java

+package Alibaba;
+
+
+/**
+ * This class implements the user system
+ * @author mohammadreza
+ * @version 1.0
+ */
+public class User {
+
+	private String name;
+    private int ID;
+    
+    /**
+     * @author mohammadreza
+	 * @param name the name of user
+	 * @param iD the id of user
+	 */
+	public User(String name, int iD) {
+		this.name = name;
+		ID = iD;
+	}
+    /**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the name
+	 */
+	public String getName() {
+		return name;
+	}
+
+	/**
+	 * this is a setter method
+	 * @author mohammadreza
+	 * @param name the name to set
+	 */
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	/**
+	 * This is a getter method!
+	 * @author mohammadreza
+	 * @return the iD
+	 */
+	public int getID() {
+		return ID;
+	}
+
+	/**
+	 * this is a setter method
+	 * @author mohammadreza
+	 * @param iD the iD to set
+	 */
+	public void setID(int iD) {
+		ID = iD;
+	}
+
+	/**
+	 * this method reserve seats
+	 * @author mohammadreza
+	 * @param seatNum and plane for reserve the seat for user
+	 */
+	
+    public Ticket reserveSeat (int seatNum , Plane plane){
+        if (!plane.getSeats().get(seatNum).getDiscription()) {
+            plane.getSeats().get(seatNum).setDiscription(true);
+            // system must add this reservation
+            Ticket t = new Ticket();
+            return t;
+        }else return null;
+    }
+}

src/Test/Testing.java

+package Test;
+
+import Alibaba.*;
+import Alibaba.System;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeAll;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class Testing {
+    static System system;
+    static User user1;
+    static User user2;
+    static Plane p1;
+    static Plane p2;
+    static Flight f1;
+    @BeforeAll
+    public static void PreStarts() {
+        system = new System();
+        user1 = new User("pasha", 1);
+        user2 = new User("mamad", 2);
+        p1 = new Plane("Airbus", 10, 12, 15);
+        p2 = new Plane("Topolof", 15, 5, 5);
+        f1 = new Flight("monday", 13, "Tehran", "Berlin", "QeshmAir", p1, 123);
+    }
+
+    @Test
+    public void testReservation(){
+        Ticket t1 = user1.reserveSeat(12 , p1);
+        assertNotNull(t1);
+        Ticket t2 = user2.reserveSeat(12 , p1);
+        assertNull(t2);
+        t2 = user2.reserveSeat(15 , p1);
+        assertNotNull(t2);
+
+    }
+}
+