scope concept on java?????

[dmjpro]

i have code like this .. see carefully

void test
{
int i;
{
int i;
}
}

why does not java support this .... as C and C++ supports this

plz help me out .... thanxxxxx

[r035198x]

i have code like this .. see carefully



why does not java support this .... as C and C++ supports this

plz help me out .... thanxxxxx

They are indistinguishab le
What then would be the output of calling

 
void test {
 int i = 5;
 {
 int i = 10;
 System.out.println(i + i);
 }
}

?

[dmjpro]

i know it is not possible .....

in C and C++ there is a way to access the outer varibale using ::(scope resultion operator)

why this is stopped in java?????

thanxxxxxx

[r035198x]

i know it is not possible .....

in C and C++ there is a way to access the outer varibale using ::(scope resultion operator)

why this is stopped in java?????

thanxxxxxx

Even in c++ that wont work dj. You use the scope resolution operator when you have the context.

in

 void test { 
 int i;
}

the context of i is the function test.
in

 void test{ 
 int i;
{
int y;
}
}

The contect of y is still the function test. The {} cannot be named and so you cannot use :: with it. The scope of y is still the function test.
so having

 void test{ 
 int i;
{
int i;
}
}

wont work because both have the same context i.e the function test and so you have a duplicate variable name

[dmjpro]

can't i access in C++ using TC++-3.0


void test()
{
int i;
{
printf("%d",::i ); //outer i
printf("%d",i); //inner i
}
}

m i right ..... ??????

thanx

[r035198x]

can't i access in C++ using TC++-3.0


void test()
{
int i;
{
printf("%d",::i ); //outer i
printf("%d",i); //inner i
}
}

m i right ..... ??????

thanx

I thought :: was for global namespace. Anyway that does not compile on my VS6.0 and you missed the declaration for the inner i that you had earlier.



P.S maybe I should copy this to the C++ forum.

[dmjpro]

sorry it was my mistake .....


ok okkk again i am verryyy sorrryyyyy..... ....

[RedSon]

You're right r0. No need to copy this to c/c++

[r035198x]

sorry it was my mistake .....


ok okkk again i am verryyy sorrryyyyy..... ....

Hey DJ, you didn't do anything wrong. You were just asking and that's what the forum is for. We both learn that way.

[dmjpro]

ok thanxxxxx