public class KelasPembungkus {
    public static void main(String[] args) {
        Integer stok = Integer.valueOf(500);       // int -> Integer
        int kembali = stok.intValue();             // buka bungkus secara eksplisit
        System.out.println("stok     = " + stok);
        System.out.println("kembali  = " + kembali);

        System.out.println("MAX_VALUE = " + Integer.MAX_VALUE);
        System.out.println("BYTES     = " + Integer.BYTES);
        System.out.println("SIZE      = " + Integer.SIZE);

        int hasilParse = Integer.parseInt("2026");
        double beratParse = Double.parseDouble("62.5");
        System.out.println("hasilParse  = " + hasilParse);
        System.out.println("beratParse  = " + beratParse);

        String teks = String.valueOf(42);
        String teks2 = Integer.toString(42);
        System.out.println("teks = " + teks + ", teks2 = " + teks2);
    }
}