Have a problem on static modifier

[javalover]

public class X {
2. private static int a;
3.
5. public static void main (String[] args) {
6. modify (a);
7. }
8.
9. public static void modify (int a) {
10. a++;
11. }

why it is printing '0" ..as per the question int a should get increased and print 1
I am not understanding this

[JosAH]

public class X {
2. private static int a;
3.
5. public static void main (String[] args) {
6. modify (a);
7. }
8.
9. public static void modify (int a) {
10. a++;
11. }

why it is printing '0" ..as per the question int a should get increased and print 1
I am not understanding this

The value of the parameter 'a' is incremented, it had the same value as the
value of the private static int member with the same name. Because you didn't
explicitly initialize that static member it has the value zero.

Java passes parameters by value; always; no exception to the rule.

I don't understand why you think anything is printed at all.

kind regards,

Jos

[praveen2gupta]

public class X {
2. private static int a;
3.
5. public static void main (String[] args) {
6. modify (a);
7. }
8.
9. public static void modify (int a) {
10. a++;
11. }

why it is printing '0" ..as per the question int a should get increased and print 1
I am not understanding this

Hi
a++ operator say the print first and then increment. So change your line no 10 as below program.
a is initilized to 0 and when class and static method are loaded with it's value is first loaded to 0 after that it is incremented so you are getting it 0.

public class X 
{
private static int a;
 
public static void main (String[] args) 
    {
    modify (a);
    }
 
 public static void modify (int a) 
{
 System.out.println(++a);
 }
}
 

[r035198x]

... and the static modifier is not the problem here.

[JosAH]

... and the static modifier is not the problem here.

As a matter of fact: if 'a' weren't a *static* member, the entire thing wouldn't even
compile.

kind regards,

Jos

[r035198x]

As a matter of fact: if 'a' weren't a *static* member, the entire thing wouldn't even
compile.

kind regards,

Jos

I know but the OP's problem of a not incrementing is really because of the passing by value (and possibly the hiding) rather than the static modifier. The title of the thread would give a different impression.

[JosAH]

I know but the OP's problem of a not incrementing is really because of the passing by value (and possibly the hiding) rather than the static modifier. The title of the thread would give a different impression.

Yep, as I already wrote in post #2 ...

kind regards,

Jos