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Can u clarify this ..

 
Ranch Hand
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1. public class OuterClass {
2. private double d1 = 1.0;
3. // insert code here
4. }
Which two are valid if inserted at line 3? (Choose two)


A. static class InnerOne {
public double methoda() { return d1; }
}
B. static class InnerOne {
static double methoda() { return d1; }
}
C. private class InnerOne {
public double methoda() { return d1; }
}
D. protected class InnerOne {
static double methoda() { return d1; }
}
E. public abstract class InnerOne {
public abstract double methoda();
}
Answer: C, E Why the answers are C and E
 
Greenhorn
Posts: 24
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Option A,B & D are incorrect because static inner class or static methods cannot access non-static instance variables (here d1) directly.
 
Ranch Hand
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Here the C & E options are correct because the static method or class can't access the non static variables. So A,B & D falls in to these categories.

Thanks
 
Greenhorn
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ALSO

protected class InnerOne {
static double methoda() { return d1; }
}

Non-static inner class cannot have static declarations
 
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