83 lines
1.6 KiB
Java
83 lines
1.6 KiB
Java
// reuse/PlaceSetting.java
|
|
// (c)2020 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://OnJava8.com for more book information.
|
|
// Combining composition & inheritance
|
|
|
|
class Plate {
|
|
Plate(int i) {
|
|
System.out.println("Plate constructor");
|
|
}
|
|
}
|
|
|
|
class DinnerPlate extends Plate {
|
|
DinnerPlate(int i) {
|
|
super(i);
|
|
System.out.println("DinnerPlate constructor");
|
|
}
|
|
}
|
|
|
|
class Utensil {
|
|
Utensil(int i) {
|
|
System.out.println("Utensil constructor");
|
|
}
|
|
}
|
|
|
|
class Spoon extends Utensil {
|
|
Spoon(int i) {
|
|
super(i);
|
|
System.out.println("Spoon constructor");
|
|
}
|
|
}
|
|
|
|
class Fork extends Utensil {
|
|
Fork(int i) {
|
|
super(i);
|
|
System.out.println("Fork constructor");
|
|
}
|
|
}
|
|
|
|
class Knife extends Utensil {
|
|
Knife(int i) {
|
|
super(i);
|
|
System.out.println("Knife constructor");
|
|
}
|
|
}
|
|
|
|
// A cultural way of doing something:
|
|
class Custom {
|
|
Custom(int i) {
|
|
System.out.println("Custom constructor");
|
|
}
|
|
}
|
|
|
|
public class PlaceSetting extends Custom {
|
|
private Spoon sp;
|
|
private Fork frk;
|
|
private Knife kn;
|
|
private DinnerPlate pl;
|
|
public PlaceSetting(int i) {
|
|
super(i + 1);
|
|
sp = new Spoon(i + 2);
|
|
frk = new Fork(i + 3);
|
|
kn = new Knife(i + 4);
|
|
pl = new DinnerPlate(i + 5);
|
|
System.out.println("PlaceSetting constructor");
|
|
}
|
|
public static void main(String[] args) {
|
|
PlaceSetting x = new PlaceSetting(9);
|
|
}
|
|
}
|
|
/* Output:
|
|
Custom constructor
|
|
Utensil constructor
|
|
Spoon constructor
|
|
Utensil constructor
|
|
Fork constructor
|
|
Utensil constructor
|
|
Knife constructor
|
|
Plate constructor
|
|
DinnerPlate constructor
|
|
PlaceSetting constructor
|
|
*/
|