Please read the instructions crefelly this is a java code programming please solve it. don plagarise or copy from other sources please. Please do what in the question says .There are previous lab codes needed. So, I am providing the codes- Apartment classes from Lab 17 code - public class Apartment extends Building{ private int totalUnits; public Apartment (String name, CanadianAddress address, int squareFootage,int totalUnits) {super (name, address, squareFootage);this.totalUnits = totalUnits; } public int getTotalUnits () {return totalUnits; } public void setTotalUnits (int totalUnits) {this.totalUnits = totalUnits; }}CanadianAddress class from Lab 18 code - public class TestCanadianAddresslab18 { public static void main(String[] args) { CanadianAddress testAddress = new CanadianAddress(); CanadianAddress SMUAddress = new CanadianAddress("923 Robie St.", "Halifax", "Nova Scotia", "B3H 3C3"); System.out.println("The testAddress is created as:"); System.out.println(testAddress); System.out.println(); System.out.println("The SMUAddress is created as:"); System.out.println(SMUAddress); System.out.println(); System.out.println("The testAddress is equal to SMUAddress? : " + testAddress.equals(SMUAddress)); System.out.println(); testAddress.setStreetAddress("923 Robie St."); testAddress.setCity("Halifax"); testAddress.setProvince("Nova Scotia"); testAddress.setPostalCode("B3H 3C3"); System.out.println("The testAddress is updated as: "); System.out.println(testAddress); System.out.println(); System.out.println("The testAddress is equal to SMUAddress? : " + testAddress.equals(SMUAddress)); }}class CanadianAddress { private String streetAddress; private String city; private String province; private String postalCode; public CanadianAddress() {} public CanadianAddress(String streetAddress, String city, String province, String postalCode) { this.streetAddress = streetAddress; this.city = city; this.province = province; this.postalCode = postalCode; } public String getStreetAddress() { return streetAddress; } public void setStreetAddress(String streetAddress) { this.streetAddress = streetAddress; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getProvince() { return province; } public void setProvince(String province) { this.province = province; } public String getPostalCode() { return postalCode; } public void setPostalCode(String postalCode) { this.postalCode = postalCode; } @Override public String toString() { return (streetAddress != null ? streetAddress : "null") + ", " + (city != null ? city : "null") + "
" + (province != null ? province : "null") + " " + (postalCode != null ? postalCode : "null") + ", Canada"; } @Override public boolean equals(Object address) { if (this == address) return true; if (address == null || getClass() != address.getClass()) return false; CanadianAddress that = (CanadianAddress) address; return (this.streetAddress == null ? that.streetAddress == null : this.streetAddress.equals(that.streetAddress)) && (this.city == null ? that.city == null : this.city.equals(that.city)) && (this.province == null ? that.province == null : this.province.equals(that.province)) && (this.postalCode == null ? that.postalCode == null : this.postalCode.equals(that.postalCode)); }} InstructionsTask: Polymorphism (The Building class and its subclasses)This task practices polymorphism. You will extend and modify the Building andApartment classes from Lab 17. Save a copy of their previous implementation if youneed it. You will also use the new CanadianAddress class from Lab 18. Make sure it isaccessible with proper visibility modifiers and package settings.Add to the Building class:• Override the toString() method inherited from the Object class, returning astring in the following format (you may copy the blue highlighted part): "ABuilding object:
Name: " + name + "
Address:
" + address + "
Squarefootage: " + square Footage + "
". Use the @Override annotation to make sureyou override the toString() method correctly.Add to the Apartment class:Override the toString() method inherited from the Object class, returning astring in the following format (you may copy the blue highlighted part): "AnApartment object:
Name: " + this.getName() + "
Address:
" +this.getAddress() + "
Square footage: " + this.getSquareFootage() + "
Totalunits: " + totalUnits + "
". Use the @Override annotation to make sure youoverride the toString() method correctly.Write a Mall class that extends the Building class and contains:.A private String[] data field named stores that contains a list of store names inthe mall. You do not need to create the array or initialize the array referencevariable when declaring this data field. These will be done in the constructor.You can just declare the array reference variable. You must use the given namefor the data field.• A constructor that accepts the following four parameters: a reference to aString object named name, a reference to a CanadianAddress object namedaddress, an int named squareFootage, and a reference to a String[] arraynamed stores. You must use the given parameter names. The first threeparameters are to be passed to the superclass's constructor.• Getter and setter methods for the data field stores.• Override the toString() method inherited from the Object class. Firstly, create aString named storeList that concatenating all the store names in the data fieldstores, separating the store names by a comma and a space", ". Secondly,return a string in the following format (you may copy the blue highlightedpart): "A Mall object:
Name: " + this.getName() + "
Address:
" +this.getAddress() + "
Square footage: " + this.getSquareFootage() + "
Stores:+ storeList. Use the @Override annotation to make sure you override thetoString() method correctly.So far, you have three classes Building, Apartment, and Mall. Each class has its ownversion of the toString() method which returns a String representation of the object,including the object type. The object type is used to help us distinguish whichtoString() method is invoked and see how polymorphism works.Write a test class named TestPolymorphismWithBuilding that performs thefollowings in the given order:• Create a Building object:1. Create a CanadianAddress object named address1 with the emptyaddress, using the no-arg constructor.2. Create a Building object with the building name "my empty building",address1, and the square footage 0.3. Assign the above object to a Building type reference variable namedbuilding.• Create an Apartment object and assign its reference to a Building referencevariable:1. Create a CanadianAddress object named address2 for the followingaddress: 1030 South Park St., Halifax,Nova Scotia B3H 2W3, Canada2. Create an Apartment object with the building name "Somerset PlaceApartment", address2, the square footage 100000, and total units 100.3. Assign the above object to a Building type reference variablenamed apartment. Note the reference variable should be declared asBuilding type.• Create a Mall object and assign its reference to a Building reference variable:1. Create a CanadianAddress object named address3 for the followingaddress: 7001 Mumford Rd., Halifax,Nova Scotia B3L 4R3, Canada2. Create a String[] array named stores that contains the following strings:"Aldo", "American Eagle", and "Apple".3. Create a Mall object with the building name "Halifax Shopping Centre",address3, the square footage 200000, and stores.4. Assign the above object to a Building type reference variablenamed mall. Note the reference variable should be declared as Buildingtype.• Print out the three objects building, apartment, and mall using:System.out.println(building);System.out.println(apartment);System.out.println(mall);• Observe that the toString() methods are invoked according to the actual typesof the referenced objects, not the declared type of the reference variables.Additional requirement:Put all the classes in separate files. You should have the following files (all files shouldbe included in an online submission):•CanadianAddress.java: from Lab 18, unchanged•Building.java: from Lab 17, modifiedApartment.java: from Lab 17, modified• Mall.java: created in this lab•TestPolymorphismWithBuilding.java: created in this lab.A sample run is as follows:A Building object:Name: my empty buildingAddress:null, null,null null, CanadaSquare footage: 0An Apartment object:Name: Somerset Place ApartmentAddress:1030 South Park St., Halifax,Nova Scotia B3H 2W3, CanadaSquare footage: 100000Total units: 100A Mall object:Name: Halifax Shopping CenterAddress:7001 Mumford Rd., Halifax,Nova Scotia B3L 4R3, CanadaSquare footage: 200000Stores: Aldo, American Eagle, Apple

Question

Please read the instructions crefelly this is a java code programming please solve it. don plagarise or copy from other sources please. Please do what in the question says .There are previous lab codes needed. So, I am providing the codes- Apartment classes from Lab 17 code - public class Apartment extends Building{  private int totalUnits;  public Apartment (String name, CanadianAddress address, int squareFootage,int totalUnits)  {super (name, address, squareFootage);this.totalUnits = totalUnits;  }  public int getTotalUnits ()  {return totalUnits;  }  public void setTotalUnits (int totalUnits)  {this.totalUnits = totalUnits;  }}CanadianAddress class from Lab 18 code - public class TestCanadianAddresslab18 {    public static void main(String[] args) {        CanadianAddress testAddress = new CanadianAddress();        CanadianAddress SMUAddress = new CanadianAddress(&#34;923 Robie St.&#34;, &#34;Halifax&#34;, &#34;Nova Scotia&#34;, &#34;B3H 3C3&#34;);        System.out.println(&#34;The testAddress is created as:&#34;);        System.out.println(testAddress);         System.out.println();        System.out.println(&#34;The SMUAddress is created as:&#34;);        System.out.println(SMUAddress);         System.out.println();        System.out.println(&#34;The testAddress is equal to SMUAddress? : &#34; + testAddress.equals(SMUAddress));        System.out.println();        testAddress.setStreetAddress(&#34;923 Robie St.&#34;);        testAddress.setCity(&#34;Halifax&#34;);        testAddress.setProvince(&#34;Nova Scotia&#34;);        testAddress.setPostalCode(&#34;B3H 3C3&#34;);        System.out.println(&#34;The testAddress is updated as: &#34;);        System.out.println(testAddress);         System.out.println();        System.out.println(&#34;The testAddress is equal to SMUAddress? : &#34; + testAddress.equals(SMUAddress));    }}class CanadianAddress {    private String streetAddress;    private String city;    private String province;    private String postalCode;    public CanadianAddress() {}    public CanadianAddress(String streetAddress, String city, String province, String postalCode) {        this.streetAddress = streetAddress;        this.city = city;        this.province = province;        this.postalCode = postalCode;    }    public String getStreetAddress() {        return streetAddress;    }    public void setStreetAddress(String streetAddress) {        this.streetAddress = streetAddress;    }    public String getCity() {        return city;    }    public void setCity(String city) {        this.city = city;    }    public String getProvince() {        return province;    }    public void setProvince(String province) {        this.province = province;    }    public String getPostalCode() {        return postalCode;    }    public void setPostalCode(String postalCode) {        this.postalCode = postalCode;    }    @Override    public String toString() {        return (streetAddress != null ? streetAddress : &#34;null&#34;) + &#34;, &#34; +                (city != null ? city : &#34;null&#34;) + &#34;
&#34; +                (province != null ? province : &#34;null&#34;) + &#34; &#34; +                (postalCode != null ? postalCode : &#34;null&#34;) + &#34;, Canada&#34;;    }    @Override    public boolean equals(Object address) {        if (this == address) return true;        if (address == null || getClass() != address.getClass()) return false;        CanadianAddress that = (CanadianAddress) address;        return (this.streetAddress == null ? that.streetAddress == null : this.streetAddress.equals(that.streetAddress))                && (this.city == null ? that.city == null : this.city.equals(that.city))                && (this.province == null ? that.province == null : this.province.equals(that.province))                && (this.postalCode == null ? that.postalCode == null : this.postalCode.equals(that.postalCode));    }} InstructionsTask: Polymorphism (The Building class and its subclasses)This task practices polymorphism. You will extend and modify the Building andApartment classes from Lab 17. Save a copy of their previous implementation if youneed it. You will also use the new CanadianAddress class from Lab 18. Make sure it isaccessible with proper visibility modifiers and package settings.Add to the Building class:• Override the toString() method inherited from the Object class, returning astring in the following format (you may copy the blue highlighted part): &#34;ABuilding object:
Name: &#34; + name + &#34;
Address:
&#34; + address + &#34;
Squarefootage: &#34; + square Footage + &#34;
&#34;. Use the @Override annotation to make sureyou override the toString() method correctly.Add to the Apartment class:Override the toString() method inherited from the Object class, returning astring in the following format (you may copy the blue highlighted part): &#34;AnApartment object:
Name: &#34; + this.getName() + &#34;
Address:
&#34; +this.getAddress() + &#34;
Square footage: &#34; + this.getSquareFootage() + &#34;
Totalunits: &#34; + totalUnits + &#34;
&#34;. Use the @Override annotation to make sure youoverride the toString() method correctly.Write a Mall class that extends the Building class and contains:.A private String[] data field named stores that contains a list of store names inthe mall. You do not need to create the array or initialize the array referencevariable when declaring this data field. These will be done in the constructor.You can just declare the array reference variable. You must use the given namefor the data field.• A constructor that accepts the following four parameters: a reference to aString object named name, a reference to a CanadianAddress object namedaddress, an int named squareFootage, and a reference to a String[] arraynamed stores. You must use the given parameter names. The first threeparameters are to be passed to the superclass's constructor.• Getter and setter methods for the data field stores.• Override the toString() method inherited from the Object class. Firstly, create aString named storeList that concatenating all the store names in the data fieldstores, separating the store names by a comma and a space&#34;, &#34;. Secondly,return a string in the following format (you may copy the blue highlightedpart): &#34;A Mall object: 
Name: &#34; + this.getName() + &#34;
Address:
&#34; +this.getAddress() + &#34;
Square footage: &#34; + this.getSquareFootage() + &#34;
Stores:+ storeList. Use the @Override annotation to make sure you override thetoString() method correctly.So far, you have three classes Building, Apartment, and Mall. Each class has its ownversion of the toString() method which returns a String representation of the object,including the object type. The object type is used to help us distinguish whichtoString() method is invoked and see how polymorphism works.Write a test class named TestPolymorphismWithBuilding that performs thefollowings in the given order:• Create a Building object:1. Create a CanadianAddress object named address1 with the emptyaddress, using the no-arg constructor.2. Create a Building object with the building name &#34;my empty building&#34;,address1, and the square footage 0.3. Assign the above object to a Building type reference variable namedbuilding.• Create an Apartment object and assign its reference to a Building referencevariable:1. Create a CanadianAddress object named address2 for the followingaddress: 1030 South Park St., Halifax,Nova Scotia B3H 2W3, Canada2. Create an Apartment object with the building name &#34;Somerset PlaceApartment&#34;, address2, the square footage 100000, and total units 100.3. Assign the above object to a Building type reference variablenamed apartment. Note the reference variable should be declared asBuilding type.• Create a Mall object and assign its reference to a Building reference variable:1. Create a CanadianAddress object named address3 for the followingaddress: 7001 Mumford Rd., Halifax,Nova Scotia B3L 4R3, Canada2. Create a String[] array named stores that contains the following strings:&#34;Aldo&#34;, &#34;American Eagle&#34;, and &#34;Apple&#34;.3. Create a Mall object with the building name &#34;Halifax Shopping Centre&#34;,address3, the square footage 200000, and stores.4. Assign the above object to a Building type reference variablenamed mall. Note the reference variable should be declared as Buildingtype.• Print out the three objects building, apartment, and mall using:System.out.println(building);System.out.println(apartment);System.out.println(mall);• Observe that the toString() methods are invoked according to the actual typesof the referenced objects, not the declared type of the reference variables.Additional requirement:Put all the classes in separate files. You should have the following files (all files shouldbe included in an online submission):•CanadianAddress.java: from Lab 18, unchanged•Building.java: from Lab 17, modifiedApartment.java: from Lab 17, modified• Mall.java: created in this lab•TestPolymorphismWithBuilding.java: created in this lab.A sample run is as follows:A Building object:Name: my empty buildingAddress:null, null,null null, CanadaSquare footage: 0An Apartment object:Name: Somerset Place ApartmentAddress:1030 South Park St., Halifax,Nova Scotia B3H 2W3, CanadaSquare footage: 100000Total units: 100A Mall object:Name: Halifax Shopping CenterAddress:7001 Mumford Rd., Halifax,Nova Scotia B3L 4R3, CanadaSquare footage: 200000Stores: Aldo, American Eagle, Apple

Accepted Answer

Define the CanadianAddress class:Create a class named CanadianAddress.Add private fields for street…