OnJava8-Examples/enums/Input.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// enums/Input.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.*;

public enum Input {

NICKEL(5), DIME(10), QUARTER(25), DOLLAR(100),

TOOTHPASTE(200), CHIPS(75), SODA(100), SOAP(50),

ABORT_TRANSACTION {

@Override public int amount() { // Disallow

throw new RuntimeException("ABORT.amount()");

}

STOP { // This must be the last instance.

@Override public int amount() { // Disallow

throw new

RuntimeException("SHUT_DOWN.amount()");

}

};

int value; // In cents

Input(int value) { this.value = value; }

Input() {}

int amount() { return value; }; // In cents

static Random rand = new Random(47);

public static Input randomSelection() {

// Don't include STOP:

return

values()[rand.nextInt(values().length - 1)];

}