posted 13 years ago
interface A
{
public int getValue();
}
class B implements A
{
public int getValue()
{
return 1;
}
}
class C extends B
{
}
which three are valid code fragments to insert into class C ?
1. public void add(C c)
{
c.getValue();
}
2. public void add(B b)
{
b.getValue();
}
3. public void add(A a)
{
a.getValue();
}
4. public void add(A a, B b)
{
a.getValue();
}
5. public void add(C c1, C c2)
{
c1.getValue();
}
again this question is also not clear to me that how to select particular answer?