class ProfilSiswa {
    String nama;      // reference type, default null
    int umur;         // primitive, default 0
    double ipk;       // primitive, default 0.0
    boolean lulus;    // primitive, default false
}

public class NilaiBawaan {
    public static void main(String[] args) {
        ProfilSiswa siswa = new ProfilSiswa(); // field belum diisi sama sekali
        System.out.println("nama  = " + siswa.nama);
        System.out.println("umur  = " + siswa.umur);
        System.out.println("ipk   = " + siswa.ipk);
        System.out.println("lulus = " + siswa.lulus);
    }
}