The finally Clause

• Cleanup needs to occur during normal and exceptional processing
• Example: Close a file
  

  FileReader reader = null;
  try
  {
   reader = new FileReader(name);
   ...
  }
  finally
  {
   if (reader != null) reader.close();
  } 
   
  

• Exception example: UrlDump
  Takes an URL, reads the web page line by line and prints it to stdout.
  A custom UrlDumpException class is defined, with extra state identifying
  the faulty URL string.
• Sources:
  Class UrlDumpException from except/UrlDumpException.java
  Class UrlDump from except/UrlDump.java
  
  Javadoc generated documentation is at except/javadocs/index.html.

• Useful starting points for URL and streams.