Mega Code Archive
Combining composition and inheritance
<![CDATA[
class A {
A(int i) {
System.out.println("A constructor");
}
}
class SubA extends A {
SubA(int i) {
super(i);
System.out.println("SubA constructor");
}
}
class B {
B(int i) {
System.out.println("B constructor");
}
}
class SubB1 extends B {
SubB1(int i) {
super(i);
System.out.println("SubB1 constructor");
}
}
class SubB2 extends B {
SubB2(int i) {
super(i);
System.out.println("SubB2 constructor");
}
}
class SubB3 extends B {
SubB3(int i) {
super(i);
System.out.println("SubB3 constructor");
}
}
// A cultural way of doing something:
class C {
C(int i) {
System.out.println("C constructor");
}
}
class SubC extends C {
private SubB1 subB1;
private SubB2 subB2;
private SubB3 subB3;
private SubA subA;
public SubC(int i) {
super(i + 1);
subB1 = new SubB1(i + 2);
subB2 = new SubB2(i + 3);
subB3 = new SubB3(i + 4);
subA = new SubA(i + 5);
System.out.println("SubC constructor");
}
}
public class MainClass{
public static void main(String[] args) {
SubC x = new SubC(9);
}
}
C constructor
B constructor
SubB1 constructor
B constructor
SubB2 constructor
B constructor
SubB3 constructor
A constructor
SubA constructor
SubC constructor
]]>