class Pelanggan {
    String nama;
}

public class PesanNpe {
    static Pelanggan p;   // field: namanya selalu tercatat di class file

    public static void main(String[] args) {
        p = null;
        try {
            System.out.println(p.nama.length());
        } catch (NullPointerException e) {
            // Helpful NullPointerExceptions (aktif sejak Java 14)
            System.out.println(e.getMessage());
        }
    }
}