Change jbutton icon when spacebar is pressed

what is wrong here? I want to change the icon of the jbutton when I press the space bar and go back to its original state when I release it

               case KeyEvent.VK_SPACE:
                ImageIcon i=new ImageIcon("image/heart.jpg");
                ImageIcon c=new ImageIcon("hug.jpg");
                if (keyCode == KeyEvent.PRESS)
                jButton1.setIcon(i);
                else if(keyCode == KeyEvent.RELEASE)
                jButton1.setIcon(c);
               break;