location2d.java

北京大学出版社的

package examples.inheritance;

/** An example point in 2D space
  */
public class Location2D {

   protected int x = 0, y = 0;

   public Location2D( int initX, int initY ) {
      x = initX;
      y = initY;
   }

   public Location2D() {
      this( 0, 0 );
   }
}