Comments in java program

     Comments are included in a program for better understanding about the program. There are three types of comments in java. They are
               1 .  Single line comment
               2 . Multi line comment
               3 . Documentation comment

Single line comment
   
     Single line comment should end on a single line and should begin with double slash (//).
                          Example:  //Java is flexible

Multi line comments

     If the comment exceeds one line, multiline comment is used. these comments must begin with /* and end with */.
         Example: /*This program is used to calculate
                              the salary of the employees*/

Documentation comments

     This comment is used to generate documentation automatically. these comments must begin with /** and ends with */. Java scans the program finds /** and */ and generate documentation automatically with the help of the documentation utility javadoc .