Events, swing, and focus

I'm using the GUI tut sticky to make a more advanced program, but i need to know:




1. how can i get the buttons to do different things? (open different apps like eclipse, javac, etc.)

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2. How can i get "always on top" functionality, like with the task manager in XP?

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3. My fetch icon code doesn't work:

Code:

		    private void loadFrameIcon() {
		        URL imgUrl = null;
		        ImageIcon imgIcon = null;
		        
		        imgUrl = Tutorial.class.getResource("lib/Jcp.ico");
		        imgIcon = new ImageIcon(imgUrl);
		        Image img = imgIcon.getImage();
		        this.setIconImage(img);
		        
		    }

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4. how do i set up a file changer, or a container that loads the contents of a folder and opens them?




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please don't answer " the semantic void event is an advanced actionlistener device boolean" noob language plz

TY!