Question

Deliverable

A zipped NetBeans project with 2 classes

• app
• ZipCode
• Address

Classes

App ZipCode Address Creates an Address object ad1 using the no-parameter constructor. - Creates an Address object ad2 using the all-parameter constructor. Creates an Address object ad3 using the all-parameter constructor. - Using the method toString(), display the data from each of the 3 objects Attributes String five Digit; String plus4; Attributes int number; String name; String type; ZipCode zip; String state; Constructors No-parameter One-parameter Two-parameter Constructors No-parameter All-parameter Methods String toString() void display() void display Prefix(int p) Methods String toString() .

Suggestion:

• Use Netbeans to copy your last lab (Lab 03) to a new project called Lab04.
• Close Lab03.
• Work on the new Lab04 project then.

The Address Class

1. Attributes
   • int number
   • String name
   • String type
   • ZipCode zip
   • String state

1. Constructors
   • one constructor with no input parameters
     • since it doesn't receive any input values, you need to use the default values below:
       • number - 0
       • name - "N/A"
       • type - "Unknown"
       • zip - use the default constructor of ZipCode
       • state - " " (two spaces)
   • one constructor with all (five) parameters
     • one input parameter for each attribute
2. Methods
   • public String toString()
     • returns this object as a String, i.e., make each attribute a String, concatenate all strings and return as one String.
     • toString() is a special method, you will learn more about it in the next lessons
       • it needs to be public
       • it needs to have @override notation (on the line above the method itself). Netbeans will suggest you do it.

The ZipCode Class (same as before)

1. Attributes
   • String fiveDigit
   • String plus4
2. Constructors
   • one constructor with no input parameters
     • since it doesn't receive any input values, you need to use the default values below:
       • fiveDigit - "00000"
       • plus4 - "0000"
   • one constructor with one parameter
     • one input parameter for fiveDigit
     • use the default value from the no-parameter constructor to initialize plus4
   • one constructor with all (two) parameters
     • one input parameter for each attribute
3. Methods (same as last lab)
   • public String toString()
     • returns this object as a String, i.e., make each attribute a String, concatenate all strings and return as one String.
     • toString() is a special method, you will learn more about it in the next lessons
       • it needs to be public
       • it needs to have @override notation (on the line above the method itself). Netbeans will suggest you do it.
   • display()
     • this method gets the "toString()" value (whatever is returned by toString() ) and uses "System.out.println" to display it.
     • you need to decide what is the type of this method
   • displayPrefix(int p)
     • this method receives an input parameter, an int number p
     • based on p's value
       • if p's value is 1
         • uses "System.out.println" to display the zipcode's prefix, i.e., its 3 first digits.
         • if the fiveDigit is "10022", displays "100"
       • if p's value is2
         • uses "System.out.println" to display the zipcode's area, i.e., its fourth and fifth digits.
         • if the fiveDigit is "10022", displays "22"
       • for any other value of p, it should not display anything

The App class

1. create an Address object called ad1 using the no-parameter constructor
2. create an Address object called ad2 using the all-parameter constructor with the value
   • number 100
   • name Rodeo
   • type Drive
   • zip 90210
   • state CA
3. create an Address object called ad3 using the all-parameter constructor with the values
   • number 210
   • name West College
   • type Avenue
   • zip 16801-2141
   • state PA
4. display all the data from each object using System.out.println and the method toString()

Output

The output should be similar to

Address{number=0, name=N/A, type=Unknown, zip=00000, state=  }
Address{number=100, name=Rodeo, type=Drive, zip=90210, state=CA}
Address{number=210, name=West College, type=Avenue, zip=16801-2141, state=PA}

Answer 1

As per your given question the code has been written and pasted here for your reference.

Proper inline comments have been written for your understanding.

I have also attached the screenshots of code and the output i got here.

Kindly go through the screenshots in case you get any difficulty in understanding the answer.

------------------------ code -----------------------

// class ZipCode

class ZipCode{

    String fiveDigit;

    String plus4;

    public ZipCode() {          // constructor with no parameter

        this.fiveDigit = "00000";

        this.plus4 = "0000";

    }

    public ZipCode(String fiveDigit) {  // constructor with one parameter

        this.fiveDigit = fiveDigit;

    }

    public ZipCode(String fiveDigit, String plus4) { // constructor with two parameter

        this.fiveDigit = fiveDigit;

        this.plus4 = plus4;

    }

    public void display(){   // display method

        System.out.println(this.fiveDigit+this.plus4);

    }

    

    public void displayPrefix(int p){     // display prefixmethod

        if(p == 1){

            // Returns a string that is a substring of this string. The substring begins at

            // the specified beginIndex and extends to the character at index endIndex - 1.

            // Thus the length of the substring is endIndex-beginIndex

            System.out.println(fiveDigit.substring(0,3));

        }else if(p == 2){

            // if we pass only one index the it is considered as beginIndex

            // and it creates substring upto last character

            System.out.println(fiveDigit.substring(3));

        }

    }

    @Override

    public String toString() {    // toString method to print the values

        // checking if plus4 value exist and it is not default value , then return both

        if(this.plus4 != null && this.plus4.equals("0000") == false){    

            return fiveDigit + "-" + plus4;                           

        }

        return this.fiveDigit;  // otherwise return only fiveDigit

    }

}

// Address class definition

class Address{

    int number;

    String name;

    String type;

    ZipCode zip;

    String state;

    public Address() {         // constructor with no parameter

        this.number = 0;

        this.name = "N/A";

        this.type = "Unknown";

        // creating new ZipCode object by calling constructor with no parameter to

        // assign defalut values

        this.zip = new ZipCode();

        this.state = " ";

    }

    // constructor with all parameter

    public Address(int number, String name, String type, String zip, String state) {

        this.number = number;

        this.name = name;

        this.type = type;

        // checking if zip string contains both fiveDigit and plus4 or not

        if(zip.contains("-")){  // contains returns true or false

            // if zip string contains both the string  the extracting each of them

            String fiveDigit = zip.substring(0, 5);

            String plus4 = zip.substring(6);

            // creating new ZipCode object by calling constructor with two parameter to

            // assign the respective values

            this.zip = new ZipCode(fiveDigit,plus4);

        }else{

            // otherwise calling constructor with only one parameter

            this.zip = new ZipCode(zip);

        }

        this.state = state;

    }

    // Overriding toString method to print the object in given format

    @Override

    public String toString() {

        return "Address { number=" + number

                + ",name=" + name + ", type=" + type + ", zip=" + zip

                + ", state=" + state + "}";

    }

}

/**

* App class

*/

public class App {

    public static void main(String[] args) {   // main method

        // creating Address objects as requird

        Address ad1 = new Address();

        Address ad2 = new Address(100, "Rodeo", "Drive", "90210", "CA");

        Address ad3 = new Address(210,"West College","Avenue","16801-2141","PA");

        

        // printing all the three objects

        System.out.println(ad1);

        System.out.println(ad2);

        System.out.println(ad3);

    }

}

-------------------------------------------Screenshots ----------------------------------------

o-------------------------------------output -------------------------------------------