• The Java J2SE API contains thousands of classes and methods that can help you do most of the tasks that your applications require.
• Researching the Java API documentation to find the classes and methods that you need is one of the most time-consuming aspects of Java programming.
• If you've installed the API documentation on your hard drive, you can display an index by using your web browser to go to the index.html file in the docs\api directory.
• If you haven't installed the documentation, you can browse through it on the Java web site.
• Once you display the documentation for a class, you can scroll through it or click on a hyperlink to get more information.

The documentation for the Scanner class