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javadoc

javadoc. Purpose of javadoc. javadoc is a program that reads your Java program and produces great-looking documentation in HTML format Without any help, javadoc will document the structure of your program

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javadoc

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  1. javadoc

  2. Purpose of javadoc • javadoc is a program that reads your Java program and produces great-looking documentation in HTML format • Without any help, javadoc will document the structure of your program • javadoc will also read your specially-written “javadoc comments” and include them in its documentation

  3. Java documentation is in javadoc Sun's Java API (Application Programmer's Interface) is a wonderful resource Keep this open in a browser window when you are programming in Java Go to: http://java.sun.com/j2se/1.3/docs/ Click on Java 2 Platform API Specification Here’s what it looks like:

  4. javadoc comments • Ordinary comments: /*any text*/ • javadoc comments: /** any text */ • /** Single line comments are like this */ • /** * Multi-line comments are usually * written like this; the stars at the * front of lines are ignored. */

  5. What can be commented • You can use javadoc comments for • classes • fields (variables) • methods • constructors • interfaces • javadoc ignores internal comments (in front of statements, blocks, etc.)

  6. Placement of javadoc comments • You can put a javadoc comment immediately before a class, field, method, constructor, or interface • Nothing but whitespace can come between a javadoc comment and the thing being commented • Badly placed javadoc comments are ignored

  7. Examples • /** This is a comment for variable max */double max;double min; /** This comment is for avg */double avg; • /** This comment is ignored. *///class Something { . . . }

  8. HTML in javadoc • If you know HTML, you can put some HTML commands in javadoc comments • You can use bold, italic, paragraph, various kinds of lists, hypertext links, images, etc. • You can not use document structuring commands, such as <head>, <h2>, or <hr>

  9. Special tags • Special tags begin with @ and must be the first thing on the line • Tags are used for describing parameters, return types, related methods, etc. • You should always use the @author tag for class assignments • Example: • @author John Q. Student

  10. Running javadoc • To run javadoc, use:javadoc -author -private *.java • The -author flag tells it not to ignore your @author comments • The -private flag tells javadoc to document private, package, and protected items as well as public ones

  11. javadoc options • javadoc has many options and is much more flexible than these slides suggest • javadoc generates several HTML files, not just one • Whenever you use javadoc, you should examine the results to make sure you got the results you expected

  12. The End

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