soccerball.java

来自「程序练习中包括书中实例程序代码和练习中要用到的代码,是压缩文件」· Java 代码 · 共 49 行

package examples.inheritance;

interface Inflatable {
   public void inflate();
}

interface Kickable {
   public void kick();
}

class SportsBall {
   public void manufacture() {
      System.out.println( "Making a sports ball." );
   }
}

public class SoccerBall extends SportsBall
         implements Inflatable, Kickable {
   public void inflate() {
      System.out.println( "Inflating a soccer ball." );
   }

   public void kick() {
      System.out.println( "Kicking a soccer ball." );
   }

   public static void g1( Inflatable x ) {
      x.inflate();
   }

   public static void g2( Kickable y ) {
      y.kick();
   }

   public static void g3( SportsBall z ) {
      z.manufacture();
   }

   public static void main( String[] args ) {
      SoccerBall ball = new SoccerBall();
      ball.inflate();
      ball.kick();
      ball.manufacture();

      g1( ball );
      g2( ball );
      g3( ball );
   }
}