JAVA: Write a program that demonstrates the DomainName class by prompting the us

Question

JAVA: Write a program that demonstrates the DomainName class by prompting the user for the domain name and displays the output of the last three methods.

Write a DomainName class that encapsulates the concept of a domain name, assuming a domain name has a single attribute: the domain name itself. Include the following:

- Constructor: accepts the domain name as an argument.

- getDomain: an accessor method for the domain name field.

- setDomain: a mutator method for the domain name field.

- prefix: a method returning whether or not the domain name starts with www.

- extension: a method returning the extension of the domain name (i.e. the letters after the last dot, for instance com, gov, or edu; if there is no dot in the domain name, then you should return "unknown")

- name: a method returning the name itself (which will be the characters between www and the extension; for instance, yahoo if the domain is www.yahoo.com- (Links to an external site.)--if there are fewer than two dots in the domain name, then your method should return "unknown").

Write a program that demonstrates the DomainName class by prompting the user for the domain name and displays the output of the last three methods.

NOTE: The DomainName class is a new class within your project. This does not affect the name of your Java Project above.

Explanation / Answer

Hi,

Please see below the Java Class. Please comment for any querieseedbacks.

Thanks,

Anita

DomainName.java

import java.util.Scanner;

public class DomainName {
   private String domain;

   public String getDomain() {
       return domain;
   }

   //Mutator method for domain
   public void setDomain(String domain) {
       this.domain = domain;
   }

   //Accessor method for domain
   public DomainName(String domain) {
       this.domain =domain;
       }
  
   //a method returning whether or not the domain name starts with www.
   public boolean prefix(){
       boolean retVal=false;
       //checking if the domain name starts with www.
       if(this.domain.startsWith("www.", 0)){
           retVal =true;
       }
       else{
           retVal= false;
       }
      
       return retVal;
   }
  
  
   // a method returning the extension of the domain name
   public String extension(){
      
       String extension= "";
      
       String [] domArr = this.getDomain().split("[.]");
       int length= domArr.length;
       if(null== domArr || domArr.length ==0){
           extension ="unknown";
       }
       else if(domArr.length>2){
           extension = domArr[length-1];
       }
       return extension;
   }
  
   //a method returning the name itself
   public String name(){
       String name= "";
       String extension =this.extension();
       name =this.getDomain().replaceFirst("www.", "");
       name =name.replaceFirst("[.]"+extension, "");
      
       String [] domArr = this.getDomain().split("[.]");
       if(null== domArr || domArr.length ==0){
           name ="unknown";
       }
      
       return name;
      
   }
  
//main method
   public static void main(String [] args){
      
       Scanner scan = new Scanner(System.in);
       System.out.println("Please Enter the domain name: ");
       String domainName = scan.nextLine();
      
       //creating domain object
       DomainName domain1= new DomainName(domainName);
      
       System.out.println("Does your Domain name contain "www." :"+domain1.prefix());
       System.out.println("Domain Extension is : "+ domain1.extension());
       System.out.println("Domain Name is:"+domain1.name());
      
   }

}

Sample output:

Please Enter the domain name:
www.yahoo.com
Does your Domain name contain "www." :true
Domain Extension is : com
Domain Name is:yahoo

Related Questions

Navigate

• Browse (All)
• Browse J
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.