hasxy.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 examples.inheritance;

/** An example Java subclass used to demonstrate
  * inheritance concepts
  */
public class HasXY extends HasX {

   private int y;

   /** Method to set the object's value
     * @param inputY The field's new value
     */
   public void setY( int inputY ) {
      y = inputY;
   }

   /** Method to get the object's value
     * @return The value of the field
     */
   public int getY() {
      return y;
   }

   /** Method to write Y to <code>System.out</code>
     */
   public void showY() {
      System.out.println( y );
   }

   /** The test method for the class
     * @param args not used
     */
   public static void main( String[] args ) {
      HasXY obj = new HasXY();   
      obj.setY( 20 );
      obj.setX( 10 );
      obj.showY();
      obj.showX();
   }
}