Question about System.out.print behavior

[Dhruv Arya]

please help with this question ..

public class Greek{

int i =1;

public int getI(){
System.out.print("Super")
return i;
}

public static void main(String args[])
{
Greek ga = new Arabik();
System.out.println(ga.i + " " + ga.getI());
}
}

class Arabik extends Greek{
int i =2;
public int getI()
{
System.out.println("Sub");
return i;
}
}

The answer is Sub1 2 dont understand how?

[Ankit Garg]

System.out.println(ga.i + " " + ga.getI());

To print anything from this statement, JVM needs to evaluate the whole expression, so it sees that ga.i is 1 (I hope there's no confusion here), then it sees the " " after that there's a method call, so that method is called to know the return value, that method first prints Sub, then returns 2, so the whole expression in the println statement becomes 1 + " " + 2 and thus the output is Sub1 2

HTH

[rohan yadav]

How the value of ga.i becomes 1??
Since Arabik ISA Greek and it is overloading i.

[Ankit Garg]

There's nothing such as overloading of instance variables. Read about this here...

[Dhruv Arya]

Thanks ankit got what you meant !

[Surya Priyadarshini]

Thankyou Ankit, for the explanation of -why Sub is printed 1st and then comes the values 1 and 2.

My question is, how is ga.i evaluated to 1? Clearly, ga is an Arabik object and Arabik class overrides the value of instance varibale i to 2, so at runtime should'nt it get the value 2 for i? If not, is runtime polymorphism applicable only to methods and not instance variables?

I hope I am making my doubt clear.
Thankyou,
Surya

[Henry Wong]

Surya Priyadarshini wrote:My question is, how is ga.i evaluated to 1? Clearly, ga is an Arabik object and Arabik class overrides the value of instance varibale i to 2, so at runtime should'nt it get the value 2 for i? If not, is runtime polymorphism applicable only to methods and not instance variables?

From an earlier post from this exact topic....

Ankit Garg wrote:There's nothing such as overloading of instance variables. Read about this here...

There's no such thing as overriding instance variables either.

Henry

[Atwal Usha]

Please remember that overriding is applicable only for instance methods and not instance variables.