The bold characters in the following listing
are comments.
/**
* The HelloWorldApp class implements an application that
* simply displays "Hello World!" to the standard output.
*/
class HelloWorldApp {
public static void main(String[] args) {
System.out.println("Hello World!"); //Display the string.
}
}
The Java language supports
three kinds of comments:
-
/* text */
- The compiler ignores everything from
/* to
*/.
-
/** documentation */
- This indicates a documentation comment
(doc comment, for short).
The compiler ignores this kind of comment,
just like it ignores comments that use
/* and
*/.
The JDK javadoc tool uses doc comments
when preparing automatically generated documentation.
For more information on javadoc, see the
Java tool documentation
.
-
// text
- The compiler ignores everything from
// to the end of the line.
