Code Comments in Java Program

Commenting Methods used in Java Program

Code comments in JAVA Source Code

Code comments are placed in source files to describe what is happening in the code to someone who might be reading the file, to comment-out lines of code to isolate the source of a problem for debugging purposes, or to generate API documentation. To these ends, the Java language supports three kinds of comments: double slashes, C-style, and doc comments.

Double Slashes

Double slashes (//) are used in the C++ programming language, and tell the compiler to treat everything from the slashes to the end of the line as text.

//A Very Simple Example

class ExampleProgram {
          public static void main(String[] args){
          System.out.println("I'm a Simple Program");
          }
}

C-Style Comments

Instead of double slashes, you can use C-style comments (/* */) to enclose one or more lines of code to be treated as text.

/* These are C-style comments */
class ExampleProgram {
         public static void main(String[] args){
         System.out.println("I'm a Simple Program");
         }
}

Doc Comments

To generate documentation for your program, use the doc comments (/** */) to enclose lines of text for the javadoc tool to find. The javadoc tool locates the doc comments embedded in source files and uses those comments to generate API documentation.

/** This class displays a text string at 
* the console.
*/
class ExampleProgram {
          public static void main(String[] args){
          System.out.println("I'm a Simple Program");
          }
}