Question

In: Computer Science

LANGUAGE: JAVA Create a New Project called YourLastNameDomainName. Write a DomainName class that encapsulates the concept...

LANGUAGE: JAVA

Create a New Project called YourLastNameDomainName.

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.

ALSO, DO NOT FORGET TO INCLUDE THE FOLLOWING AS A COMMENT SECTION AT THE TOP OF YOUR PROGRAM:

1. Student Name

2. Program Name

3. Short Program Description

4. Due Date

Domain Name Rubric
Criteria	Ratings	Points
Correct Project Name		2.0
Constructor Defined Correctly		2.0
Accessor and Mutator Method Defined Correctly		2.0
Prefix Method Defined Correctly		2.0
Extension Method Defined Correctly		2.0
Name Method Defined Correctly		2.0
DomainName Class Created Correctly		2.0
Output Correct		4.0

Total Possible Points		20.0

Expert Solution

// DomainName.java

public class DomainName
{

private String domainName;

   public DomainName()
   {
       domainName = "";
   }

   public DomainName(String name)
   {
       domainName = name;
   }

   public void SetDomain(String name)
   {
       domainName = name;
   }

   public String GetDomain()
   {
       return domainName;
   }

   public boolean prefix()
   {
       return domainName.startsWith("www");
   }

   public String extension()
   {
       int index= domainName.lastIndexOf('.');
       if(index>0)
           return domainName.substring(index+1);

return "unknown";
}

   public String name()
   {
       int first= domainName.indexOf('.');
       int last= domainName.lastIndexOf('.');
       if(first==-1 || last == -1 || first==last)
           return "unknown";

return domainName.substring(first+1, last);
}

   public static void main(String[] args)
   {
       DomainName y = new DomainName("www.bing.com");

       System.out.println("Domain start with www ? " + y.prefix());
       System.out.println("Domain name: " + y.name());;
       System.out.println("Domain extension: " + y.extension());;

}

/*

output:

Domain start with www ? true
Domain name: bing
Domain extension: com

*/

venereology answered 2 weeks ago

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