Inheritance1

x1 is-a X
x1 is-a Object
x1 is-NOT-a Y
y1 is-a Y
y1 is-a X
y1 is-a Object


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Inheritance2

x1.i= 3
y1.i= 3
y1.j= 4
hello from X m1()
hello from X m1()
hello from Y m2()


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Inheritance3

hello from X m1()
hello from X m1()
**********
hello from Z m1()
hello from W m1()
hello from Z m1()
hello from X m1()
hello from X m1()
hello from X m1()
hello from X m1()
hello from X m1()
hello from X m1()
hello from Z m1()


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Inheritance4

x1.getI_priv()= 3
x1.i_prot= 3
y1.i_prot= 3
hello from Y m2()
x1.i_prot= 3
y1.i_prot= 12


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Inheritance5

creating an X:  hello from X() constructor

creating an X(4):  hello from X(int) constructor

creating an Y():  hello from X() constructor
hello from Y() constructor

creating an Y(3.0):  hello from X() constructor
hello from Y(double) constructor

creating an Y(3):  hello from X(int) constructor
hello from Y(int) constructor


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Polymorphism

x1.m1Inherited():  hello from X m1()
x1.m3Overridden():  hello from X m3()
y1.m1Inherited():  hello from X m1()
y1.m3Overridden():  hello from Y m3()
y1.m2Subclass():  hello from Y m2()
x2.mInherited():  hello from X m1()
x2.m3Overridden():  hello from Y m3()
((Y)x2).m2Subclass():  hello from Y m2()
((Y)x2).m2Subclass():  hello from Y m2()
((Y)x1).m2Subclass():  hello from Y m2()