why??error?

Question

class ABCD
{
public int i=0;
public ABCD(String text)
{
i=1;
}
}
class Sub extends ABCD
{
public Sub(String text)
{
i=2;
}
public static void main(String args[])
{
Sub b=new Sub("hello");
System.out.print(b.i);
}
}

Answer 1

In class ABCD since you have defined a parametrized constructor so the compiler now won't automatically create the default constructor ABCD(){}
so when you create an object of the derived class. there is no matching constructor to be called for base class.
Here, there are 2 wats to get your code working:
1. add
super(text);
as first line inside derived class's constructor
2. define the default constructor for base class explicitly
ABCD(){}

Answer 2

Another reason, (Neeraj's reason it's correct too)
Is because you didn't define the data types of your "i" variables