Enums in java: Another Example

Here's another example of using enums. Note that the constructor of an enum cannot be public.

checkout the code here

/**

* An enum for various payment modes.

* The payment mode also specifies a surcharge to be charged for making payments.

*

* @author megha birmiwal

*/

public enum PaymentMode {

CASH(0),

CHECK(0.5),

CREDIT_CARD(1.5),

DEBIT_CARD(1.0),

GIFT_CARD(0),

PAYPAL(1.5),

MONEY_ORDER(0.3);

private final double surcharge;

private PaymentMode(double surcharge) {

this.surcharge = surcharge;

}

public double getSurcharge() {

return surcharge;

}

}

/**

* Lists all payment modes and their surcharges.

*

* @author megha birmiwal

*/

public class PaymentModeLister {

public static void main(String[] args) {

// .values() returns an array of all possible values

PaymentMode[] values = PaymentMode.values();

for (PaymentMode pm : PaymentMode.values()) {

System.out.println(pm.name() + " / " + pm.getSurcharge());

}

// go from string to the corresponding enum

PaymentMode pm = PaymentMode.valueOf("PAYPAL");

System.out.println(pm == PaymentMode.PAYPAL);

// throws exception because there is no enum value called XYZ

PaymentMode mode = PaymentMode.valueOf("XYZ");

}

}