static context

[fengqiao cao]

hi, there
i know we can't invoke nonstatic method in static context, it is obvious that line2 is not legal. However, i don't understand why we can invoke non-static mehond inside main()which is also static method(line 1). could anyone help?
thanks in adv...
public class chenwei{
chenwei(){
System.out.println("how are you");
}
static void chen(){

//this.wei();//2
}
public void wei(){
int b=23;
System.out.println("i got you");
}

public static void main(String args[]){
chenwei baby=new chenwei();
baby.chen();//1
}

}

[James Thomson]

You're quite right. You CAN'T invoke a non-static method from the static main() method. However, in your example you create an instance of class Chenwei before invoking a method on that instance. This is OK. If you attempted to call the non-static method directly from main() you would get a compiler error.
public class Chenwei{
public static void chen(){
System.out.println("static");
}
public void wei(){
System.out.println("non static");
}
public static void main(String args[]){
chenwei baby=new chenwei();
baby.chen(); // OK
baby.wei(); // OK
chen(); //OK
wei(); // Compiler error! Static reference to non-static method
}
}
Hope that makes sense!