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 member variables for the sender, recipient, and title of an email message. Implement appropriate accessor and mutator 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 a member 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, create several sample objects of type Email and File in your 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)
Java programming deploying inheritance is examined.
productivity based solutions
Microsoft has expended a lot of effort into developing productivity tools for the Web, particularly with the .NET strategy. However, there are many other tools for creating Web solutions, eg. PHP, ColdFusion etc... The .NET strategy is extremely comprehensive, and yet there is always the continuing us versus Microsoft argument. Discuss the merits of adopting such an approach as a business strategy, and do you think it's wise given the enormous productivity gains offered by the .NET solutions? Compare any other productivity based solutions you may have come across in your readings.
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