Overriding interface's variable?

Question

As I read from various Java book and tutorials, variables declared in a interface are constants and can\'t be overridden.

I made a simple code to test it

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Answer 1

It is not overridden, but shadowed, with additional confusion because the constant in the interface is also static.

Try this:

A_INTERFACE o = new A_CLASS();
System.out.println(o.var);

You should get a compile-time warning about accessing a static field in a non-static way.

And now this

A_CLASS o = new A_CLASS();
System.out.println(o.var);
System.out.println(A_INTERFACE.var);  // bad name, btw since it is const