About Question enthuware.ocajp.i.v8.2.1477 :

[admin]

Both are different situations. Bungalow extends House but I2 doesn't extend I1.
-Paul.

[vidyats]

In this question, is there any way to get Houses default method to be used rather than overridden method?
say I want to print "101 Main Str";

[admin]

No, that is not possible from any Bungalow instance.

[asenevtimov]

What about System.out.pirntln(House.super.getAddress());

[admin]

What happened when you tried it out?

[pinnacle28188]

I thought that interfaces could only be method signatures with out any code?

[admin]

I thought that interfaces could only be method signatures with out any code?

That was indeed the case before Java 8. Java 8 allows you to define methods (static and default). Here is a link that explains this nicely: https://www.journaldev.com/2752/java-8- ... ult-method

[pinnacle28188]

Thanks for that explanation.

[kevin35]

Code: Select all

interface House {
	int x=1;
	public default String getAddress() {
		return "101 Main Str";
	}
}
interface Bungalow extends House {
	int x=1;
	public default String getAddress() {
		return "101 Smart Str";
	}
}
class MyHouse implements Bungalow, House {
	 void foo() {
      getAddress();
		System.out.println(x);   //compile error: The field x is ambiguous
	}
}

Hello Paul,
class MyHouse doesn't have a problem with the overriding methods
but why it does not work for variable?
doesn't Bungalow hide the variable x in house?

[admin]

Yes, x in Bungalow does hide the x in House but your MyHouse class implements both the interfaces so it gets access to two xs independently. If you just implement Bungalow, Bungalow's x will be used instead of House's x.

Unlike static fields (and also static methods and instance fields), instance methods are overridden (not hidden). There are different rules for overriding. The nearest superclass's or interface's method overrides any other implementation of the same method that it might have inherited. So in this case Bungalow's getAddress will override House's getAddress. Unlike, the variable x, MyHouse will not get two versions of getAddress.