public class KonvensiPenamaan {

    // Konstanta: UPPER_SNAKE_CASE
    private static final int BATAS_STOK = 50;
    private static final String NAMA_TOKO = "Toko Sederhana";

    public static void main(String[] args) {
        // Variabel: camelCase
        int stokSaatIni = 12;
        boolean perluRestok = stokSaatIni < BATAS_STOK;

        System.out.println(NAMA_TOKO);
        System.out.println("Stok saat ini: " + stokSaatIni);
        System.out.println("Perlu restok : " + perluRestok);
        System.out.println("Saran beli   : " + hitungSaranBeli(stokSaatIni) + " unit");
    }

    // Method: camelCase, diawali kata kerja
    static int hitungSaranBeli(int stokSaatIni) {
        return BATAS_STOK - stokSaatIni;
    }
}