EJB Bad Practices: Use of AWT Swing

@Stateless
  public class ConverterSessionBean extends Component implements KeyListener, ConverterSessionRemote {
```
/* member variables for receiving keyboard input using AWT API */* 
  		
  		...
  		private StringBuffer enteredText = new StringBuffer();
  		
  		
  		 */* conversion rate on US dollars to Yen */* 
  		
  		private BigDecimal yenRate = new BigDecimal("115.3100");
  		
  		public ConverterSessionBean() {
  		```
  				super();
```
/* method calls for setting up AWT Component for receiving keyboard input */* 
  				
  				...
  				addKeyListener(this);}
  		
  		public BigDecimal dollarToYen(BigDecimal dollars) {
  		```
  			BigDecimal result = dollars.multiply(yenRate);
  			return result.setScale(2, BigDecimal.ROUND_DOWN);
  		}
```
/* member functions for implementing AWT KeyListener interface */* 
  		
  		public void keyTyped(KeyEvent event) {
  		```
  			...
  		}
  		public void keyPressed(KeyEvent e) {
  		}
  		public void keyReleased(KeyEvent e) {
  		}
```
/* member functions for receiving keyboard input and displaying output */* 
  		
  		public void paint(Graphics g) {...}
  		
  		...}