001 package breakout; 002 003 /** Defines the contract for objects that act as Walls in the game. 004 **/ 005 public interface Wall extends BreakoutComponent { 006 /** Tells if this wall kills things that hit it. 007 * @return <code>true</code> if the things that hit it should die; <code>false</code> if 008 * things that hit it are otherwise unaffected. 009 **/ 010 public boolean killing(); 011 }