Re: main class and static

Mark Space <>
Thu, 22 Nov 2007 01:10:38 GMT
Snide wrote:


My program was running fine until I tried to add a timer (util.Timer) and
relevant code.

I then wanted to add a wait() in the main() , but the compiler told me that
a non static function can't be referenced from a static context (public
static main( args...)

You got some good answers already. I'll try to paraphrase them a little.

This bit I quoted above is the important part. "Non-static function
can't be referenced from a static context." Removing the static
declarations was the wrong direction. You need to get a non-static context.

Ready? Here it is:

new SomeObject();

Yup. That's all the compiler wanted. You can new Thread() if that's
what you need. You can also new your own class.

public class Hello {
   public static void main( String [] args ) {
     new Hello().sayHi();
   public void sayHi() {
     System.out.println("Hi yall.");

Notice that I call a non static method ("sayHi") from a static one
("main" in this case) by giving it a context (context = an object).

This is how you will normally use main() -- create one or more objects
then call their methods to get your program going.

You can write Java programs in all static methods, but it's usually only
appropriate for short little demo programs.

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