Java Question on Interface and classes

[srinivasa Avvaru]

Suppose i have a variable called i is in interface and in Abstract class .suppose my class extends that class and implements the interface.Then which i values it takes?or it gives Complie or run time error?

[Seetharaman Venkatasamy]

Welcome to JavaRanch

coming to your question , what is your opinion about it?

[Martin Vanyavchich]

If I understand you correctly, then the reference in ambiguous and your class wont compile.

[Rob Spoor]

Martin's right; the following little example proves it:

class Abstract
{
    int i = 13;
}

interface Interface
{
    int i = 42;
}

class Test extends Abstract implements Interface
{
    public static void main(String[] args) throws Exception
    {
        Test test = new Test();
        System.out.println(test.i);
    }
}

If you move the "implements Interface" to class Abstract then it will compile because Abstract's i will shadow Interface's i:

class Abstract implements Interface
{
    int i = 13;
}

interface Interface
{
    int i = 42;
}

class Test extends Abstract
{
    public static void main(String[] args) throws Exception
    {
        Test test = new Test();
        System.out.println(test.i); // 13
    }
}