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Suppose i have the below class:
class Parent
{
private int ID;
private static int curID = 0;
Parent()
{
ID = curID;
curID++;
}
}
and these two subclasses:
class Sub1 extends Parent
{
//...
}
and
class Sub2 extends Parent
{
//...
}
My problem is that these two subclasses are sharing the same static curID member from parent class, instead of having different ones.
So if i do this:
{
Sub1 r1 = new Sub1(), r2 = new Sub1(), r3 = new Sub1();
Sub2 t1 = new Sub2(), t2 = new Sub2(), t3 = new Sub2();
}
ID's of r1,r2,r3 will be 0,1,2 and of t1,t2,t3 will be 3,4,5. Instead of these i want t1,t2,t3 to have the values 0,1,2, ie use another copy of curID static variable.
Is this possible? And how?
747
Static methods take all the data from parameters and compute something from those parameters, with no reference to variables. We can inherit static methods in Java.
Static classes are sealed and therefore cannot be inherited. They cannot inherit from any class except Object. Static classes cannot contain an instance constructor. However, they can contain a static constructor.
Constructors, static initializers, and instance initializers are not members and therefore are not inherited.
Note that unlike normal inheritance, in static inheritance methods are not hidden. You can always call the base sayHello method by using BaseClass. sayHello() . But classes do inherit static methods if no methods with the same signature are found in the subclass.
While static fields/methods are inherited, they cannot be overridden since they belong to the class that declares them, not to the object references. If you try to override one of those, what you'll be doing is hiding it.
103
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