Java tutorial
import javax.activation.CommandInfo; import javax.activation.MailcapCommandMap; public class Main { public static void main(String[] args) { MailcapCommandMap mailcapCommandMap = new MailcapCommandMap(); String mailcap = "text/plain;" + "x-java-content-handler=beans.TextHandler;" + "x-java-view=beans.TextViewer;" + "x-java-edit=beans.TextEditor"; mailcapCommandMap.addMailcap(mailcap); 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()); } } } }