Question

Why I must pass parameter to static Method with private access control in Java.

class Test extends Teacher
{
  int field = 123;

  private static void accessInstance(Test test)
  {
    System.out.println(test);
  }
}

For the below code it generates error

  private static void accessInstance()
  {
     System.out.println("Hi there");
  }

Answer 1

The compiler will give you an error if your class is inner class and is not static, e.g.:

class X
{
    class Test
    {
        int field = 123;

        private static void accessInstance(Test test)
        {
            System.out.println(test);
        }
    }
}

This will work if the inner class is static:

 class X
{
    static class Test
    {
        int field = 123;

        private static void accessInstance(Test test)
        {
            System.out.println(test);
        }
    }
}

You should correct your post I think.

A static inner class means you can instantiate it without having an instance of an enclosing outer class instance.

JLS 8.1.3. Inner Classes and Enclosing Instances

Inner classes may not declare static members, unless they are constant
variables (§4.12.4), or a compile-time error occurs.