Head First Java - 9장 생성자와 가비지 컬렉션, TestDuck.java

class Duck {
 int pounds = 6;
 float floatability = 2.1F;
 String name = "Generic";
 long[] feathers = {1,2,3,4,5,6,7};
 boolean canFly = true;
 int maxSpeed = 25;

 public Duck() {
  System.out.println("type 1 duck");
 }

 public Duck(boolean fly) {
  canFly = fly;
  System.out.println("type 2 duck");
 }

 public Duck(String n, long[] f) {
  name = n;
  feathers = f;
  System.out.println("type 3 duck");
 }

 public Duck(int w, float f) {
  pounds = w;
  floatability = f;
  System.out.println("type 4 duck");
 }

 public Duck(float density, int max) {
  floatability = density;
  maxSpeed = max;
  System.out.println("type 5 duck");
 }
}

public class TestDuck {
 public static void main(String[] args) {
  int weight = 8;
  float density = 2.3F;
  String name = "Donald";
  long[] feathers = {1,2,3,4,5,6};
  boolean canFly = true;
  int airspeed = 22;

  Duck[] d = new Duck[7];

  d[0] = new Duck();
  d[1] = new Duck(density,weight);
  d[2] = new Duck(name,feathers);
  d[3] = new Duck(canFly);
  d[4] = new Duck(3.3F,airspeed);
  d[5] = new Duck(false);
  d[6] = new Duck(airspeed,density);
 }
}