Overview of Java Language

Comments in Java Code

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 compilerignores this kind of comment, just like it ignores comments that use /* and */.

// text The compiler ignores everything from // to the end of the line