Why can't I modify class member variable outside any methods? [duplicate]

Answer 1

here is a super simplified answer, if you want more details just add a comment ;)

class SomeVariables{
    String s;
    int dontneed;
}
class MainClass{
    // this is ok
    SomeVariables vars= new SomeVariables();
    // not allowed here, must be on method, main for example
    vars.s = "why this doesnt work?. IDE says Uknown class 'vars.s'";
    // not allowed here, must be on method, main for example
    System.out.println(vars.s);        // Accesing it also doesnt work

    void ChangeValue(){
        // it works because is on scope and inside a method
        vars.s = "why does this work?";
    }

    public static void main(String[]args){
        // here sholud be your statements var.s = ... and System.out.println
    }
}