point.java

经典的<<C how to program>一书第三版的例程。非常适合于C的初学者。

// Fig. 27.3: Point.java
// Definition of class Point

public class Point {
   protected int x, y; // coordinates of the Point

   // No-argument constructor
   public Point()
   {
      // implicit call to superclass constructor occurs here
      setPoint( 0, 0 );
   }

   // Constructor
   public Point( int a, int b )
   {
      // implicit call to superclass constructor occurs here
      setPoint( a, b );
   }

   // Set x and y coordinates of Point
   public void setPoint( int a, int b )
   {
      x = a;
      y = b;
   }

   // get x coordinate
   public int getX() { return x; }  

   // get y coordinate
   public int getY() { return y; }

   // convert the point into a String representation
   public String toString()
      { return "[" + x + ", " + y + "]"; }
}

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