how to use activation framework in java

import javax.activation.CommandInfo;import javax.activation.MailcapCommandMap;public class MailcapCommandMapDemo1 { public static void main(String[] args) { MailcapCommandMap mailcapCommandMap = new MailcapCommandMap(); String[] mimeTypes = mailcapCommandMap.getMimeTypes(); for (String mimeType : mimeTypes) { System.out.println(mimeType); CommandInfo[] commandInfos = mailcapCommandMap.getAllCommands(mimeType); for (CommandInfo info : commandInfos) { System.out.println(" " + info.getCommandName() + " : " + info.getCommandClass()); } } }}/*image/jpeg view : com.sun.activation.viewers.ImageViewerimage/gif view : com.sun.activation.viewers.ImageViewertext/* view : com.sun.activation.viewers.TextViewer edit : com.sun.activation.viewers.TextEditor*/