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Program 1
 

public class ConstructorDemo{
  // Denne klasse spiller rollen som
  // et hovedprogram 
  
  static Point p1 = new Point();
  static Point p2 = new Point(3.0);
  static Point p3 = new Point(1.1, 2.2);
  static Point p4 = new Point(p3);

  public static void main(String[] args){
    System.out.println("p1 = " + p1);
    System.out.println("p2 = " + p2);
    System.out.println("p3 = " + p3);
    System.out.println("p4 = " + p4);
  }

} // end class ConstructorDemo