Miscellany

    public void deleteABookmark() {       String s = tree.getLastSelectedPathComponent().toString();    	if(tree.getLastSelectedPathComponent() != null)    		if (s.contentEquals(root.toString()))       		    return;    		else {    			File delFile = new File(tree.getLastSelectedPathComponent().toString());    			treeModel.removeNodeFromParent((MutableTreeNode)tree.getLastSelectedPathComponent());    			delFile.delete();    		}    	else    		return;    }    public void valueChanged(TreeSelectionEvent e)  {    	    	try {    		    	 if(!tree.getLastSelectedPathComponent().toString().contentEquals("BOOKMARKS") || tree.getLastSelectedPathComponent() != null) {            BufferedReader in = new BufferedReader(new FileReader("bookmarks/" + tree.getLastSelectedPathComponent().toString()));            String s = in.readLine();                   if(s!=null) {               main.changeUrl(s);               main.addToHistory(s);               main.changeHistoryIndex();               main.checkButtons();             }    	 }    	   else         	 JOptionPane.showMessageDialog(main, "That file is not a valid Bookmark file.","Invalid bookmark file",JOptionPane.ERROR_MESSAGE);     	    	        	}  catch (IOException exc) {          	  JOptionPane.showMessageDialog(main,"That bookmark doesn't appear to exist.","Bookmark does not exist.",JOptionPane.ERROR_MESSAGE);           }   }