class Ideone {
    public static byte[] getBytes(int value) {
        int i = 4;
        byte[] res = new byte[i];
        while (i-- > 0) {
            res[i] = (byte)(value & 0xFF);
            value >>= 8;
        }
        return res;
    }
 
    public static int getInt(byte[] value) {
        int res = 0;
        for (int i = 0; i < 4; ++i) {
            res = (res << 8) | value[i] & 0xFF;
        }
        return res;
    }
 
    public static void printBytes(byte[] value) {
        for (byte it : value) {
            System.out.printf("%02X ", it);
        }
    }
 
	public static void main (String[] args) throws java.lang.Exception {
		byte[] a = getBytes(123456789);
        printBytes(a);
        System.out.println(" = " + getInt(a));
	}
}

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