krispies.java

北京大学出版社的

package questions.c5;
interface RiceCereal {
   protected void snap();
   protected void crackle();
   protected void pop();
}
public class Krispies implements RiceCereal {
   protected void snap() {
      System.out.println( "Snap!" );
   }
   protected void crackle() {
      System.out.println( "Crackle!" );
   }
   public static void main( String[] args ) {
      Krispies k = new Krispies();
      k.snap();
   }
}