Java doesn’t support multiple inheritances for classes but it supports multi-level inheritance for classes and multiple inheritances in interfaces.
Let us we understand in detail why does java not support multiple inheritance?
class A
{
void show()
{
}
}
class B
{
void show()
{
}
}
class C extends A,B
{
public static void main(String args[])
{
C obj=new C();
obj.show()
}
}
In the above example compiler will never know which method to invoke. Because show() method is there in both classes and both classes have different implementation for show() method.
But in interface implementation is unique if interfaces have the same method…
i.e. interface I1
{
show();
}
interface I2
{
show();
}
class A implements I1,I2
{
void show()
{
……………..
………………
}
public static void main(String args[])
{
A obj=new A();
obj.show()
}
}
Here, only declaration of method given in interface but implementation given only in class. So, only method from implementing class is going to be executed.
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