book.java

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

package questions.c5;
abstract class ReadingMaterial {
   private String title;
   public String getTitle() {
      return title;
   }
   public void setTitle( String t ) {
      title = t;
   }
   public abstract Object getContents();
   public abstract void setContents( Object contents );
}