Java class mess

public class test
{
    public static void main (String[] args)
    {
        System.out.println("Hello ");
        System.out.println(test2.testf());
        System.out.println(testf2());
    }

    private static int testf2()
    {
        return 5;
    }
}

class test2
{
    public static int testf()
    {
        return 10;
    }
}