Java provides three styles of comments : Comments « Java Source And Data Type « SCJP

1. SCJP
2. Java Source And Data Type
3. Comments

/* This is a
   multiline comment. */
   
// This is a single-line comment.
   
/** This is a
    multiline javadoc comment */

The first comment style supports traditional C-language comments. 
The second comment style supports single line C++ comments. 
The third comment style is used by the javadoc documentation generation tool. 


/*
 File header
*/
public class MainClass{
    /**
       This is a method
    */
    public static void main(String[] argv){
        // output
        System.out.println();

    }
}