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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 JDKjavadoc
tool uses doc comments when preparing automatically generated documentation. For more information onjavadoc
, see the Java tool documentation .// text
- The compiler ignores everything from
//
to the end of the line.
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