public class Base
{
     public static int x = 5;
}

public class Derived extends Base
{
     static
     {
          x = 3; // this is changing Base's x
     }
}

public class Main
{
     public static void main(String[] args)
     {
          System.out.println(Derived.x); // Will spit out an error, need to access the method statically, or from Base
          System.out.println(Base.x); //  prints out "3" because the static Derived got built second
     }
}

public class Derived extends Base
{
     public static int x; // may get a warning about variable hiding
     static
     {
          x = 3; // Derived's x is change, Base x is still 5
     }
}

public class Derivved extends Base
{
     public static String x = "Hello"; // again, there may be a warning about variable hiding
}