What is the use of setComment and getComment methods in Cookies ?

What is the use of setComment and getComment methods in Cookies ?,Java, C ,C++, ASP, ASP.net C# ,Struts ,Questions & Answer, Struts2, Ajax, Hibernate, Swing ,JSP , Servlet, J2EE ,Core Java ,Stping, VC++, HTML, DHTML, JAVASCRIPT, VB ,CSS, interview ,questions, and answers, for,experienced, and fresher

A cookie has a name, a single value, and optional attributes such as a comment, path and domain qualifiers, a maximum age, and a version number.

The setComment(java.lang.String purpose) method Specifies a comment that describes a cookie\'s purpose.The getComment() method returns the comment describing the purpose of the cookie, or null if the cookie has no comment.

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