doubt in asignment.

[Ashok Pradhan]

When i complie this program it give compile error as IDENIFIER EXPECTED.(i=10)

class Test
{
  int i;
  i=10;
  public static void main(String[] args)
  {}
}

[Amit Ghorpade]

Hi
this is because you cannot initialize a variable that way
just change your code to

class Test
{
  int i=10;
  public static void main(String[] args)
  {}
}

Hope this helps

[Ashok Pradhan]

Thanks,Is it a rule that you can only declare and intialize variables in the same line inside the class,but whereas when i wrote the same code inside a method it compiles succesfully.

class Test
{
public static void main(String[] args)
{
    int i;
    i=10;
}
}

[Anubhav Anand]

When you want to initilize the fields then you have to guarantee that the initilization value is available and the initilization happens in the same line as declartion. It's kind of a rule for fields initialization.

Well, this kind of initialization is very simpel and plain so, if you want to embed complex logic you can use static initialization blocks, private static methods, final methods or simple initialization blocks without static.

Hope that helps.
[ April 18, 2008: Message edited by: Anubhav Anand ]

[Sandilya Garimella]

hi ...
method is a set of instructions so you can declare a variable and assign value to it later.
but where as class is a combination of object behaviours and prperties.
in general no executable statements are written inside a class definition.

[Anubhav Anand]

Sandilya Garimella,
Welcome to JavaRanch.

Well, what you say is pretty correct and as per the OOP guidelines.
But, here it's a matter of decalring and initializing a vaiable in different lines, which is not feasible as I mentioned that the declaration and initialization go hand in hand on the same line. It's kind of a rule.
[ April 18, 2008: Message edited by: Anubhav Anand ]

[Ashok Pradhan]

Thanks to ALL.Now i got it.

[Ernest Friedman-Hill]

Originally posted by Anubhav Anand:
[QB
But, here it's a matter of decalring and initializing a vaiable in different lines, which is not feasible as I mentioned that the declaration and initialization go hand in hand on the same line. It's kind of a rule.[/QB]

No, it's not. There's no rule anything like that in the language spec. What there is, is a rule that says that executable statements -- like the assignment i=10 -- can't be put in a class body. The more general statement by Sandilya Garimella is correct.