Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Define a class named Document that contains an instance variable of type String named text that stores any textual content for the document. Create a

Define a class named Document that contains an instance variable of type String named text that stores any textual content for the document. Create a method named toString that returns the text field and also include a method to set this value.

Next, define a class for Email that is derived from Document and includes instance variables for the sender, recipient, and title of an email message. Implement appropriate set and get methods. The body of the email message should be stored in the inherited variable text. Redefine the toString method to concatenate all text fields.

Similarly, define a class for File that is derived from Document and includes an instance variable for the pathname. The textual contents of the file should be stored in the inherited variable text. Redefine the toString method to concatenate all text fields.

Finally, define a class DocumentTest that creates several sample objects of type Email and File in the main method. Test your objects by passing them to the following subroutine that returns true if the object contains the specified keyword in the text property. public static boolean ContainsKeyword(Document docObject, String keyword) { if (docObject.toString().indexOf(keyword,0) >= 0) return true ; return false ;

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image_2

Step: 3

blur-text-image_3

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

DB2 11 The Ultimate Database For Cloud Analytics And Mobile

Authors: John Campbell, Chris Crone, Gareth Jones, Surekha Parekh, Jay Yothers

1st Edition

1583474013, 978-1583474013

More Books

Students also viewed these Databases questions