[5943] in java-interest
Re: Static variable assigment
daemon@ATHENA.MIT.EDU (Thomas Ball)
Tue Mar 5 19:46:28 1996
Date: Fri, 1 Mar 1996 06:52:03 -0800
From: Thomas.Ball@Eng.Sun.COM (Thomas Ball)
To: java-interest@java.Eng.Sun.COM
Your server_port variable doesn't have a static modifier. With Java,
the static modifier makes a class variable or method; without it, the
variable or method is always associated with a specific class instance.
In your example, the main() method is static, so (being a class method)
it can only access methods and variables which are also static. You
have two options:
1. Make server_port static; or
2. Create an instance of class Connect, which can access server_port.
Tom Ball
Java Products Group
> May be I am asking silly question but I bit suporised that very simply
> peace of code cause troubles for me. I wrote applet
> where I would like to assign integer:
> class Connect extends Applet
> {
> private final static int DEFAULT_PORT=4321;
> private int server_port=DEFAULT_PORT;
>
> public static void main(String args[])
> {
>
> try
> {
> server_port = (int)Integer.parseInt(args[0]);
> // <<<< Error is here (line 67) !!!!
> }
> catch(Exception e)
> {
> System.out.println("Defaulting to port " + DEFAULT_PORT);
> }
>
> new Connect();
>
>
> .........ommited........
>
> When I compiling this the java respond to me:
>
> javac Gonnect.java
> Connect.java:67: Can't make a static reference to nonstatic variable server_port in class GenericServer.
> server_port = (int)Integer.parseInt(args[0]);
>
> Could anybody to say what does it mean?
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