The ArrayList Class and the enum Keyword - Learning Java Through Games - page 146

values of the variable value .The enum construct allows us to create a better solution that
overcomes both shortcomings.
The enum construct is similar to a class in that it allows us to create a user-defined type.
A class usually combines several types. For example, an Employee class can combine the
name of the person (of type String ) and the age of the person (of type int ). Conversely, an
enum focuses on a single primitive type and enumerates a finite number of allowed values.
An example of how to use the enum construct in our program follows.
enum Currency {
PENNY ( 1 ) , NICKEL ( 5 ) , DIME ( 1 0 ) , QUARTER ( 2 5 ) ;
private int value ;

{

private Currency( int value)

this . value = value ;
} public int getValue ()

{

return value ;

}

}

enum Face {
HEADS ( true ), TAILS( false );
private boolean value ;

private Face( boolean value) {

this . value = value ;
public boolean getValue() {
return value ;

}

}

public class Coin {

public static final double DEFAULT BIAS = 0 . 5 ;
private Currency value ;
private Face face ;
private double bias ;

public Coin() {

this . b i a s = DEFAULT BIAS ;
this . value = getRandomCoinValue () ;
flip();

}

public Coin(Currency value ) {

this . value = value ;
this . b i a s = DEFAULT BIAS ;
flip();

}

public Coin(Currency value , double bias) {

this . value = value ;
this .bias = bias;
flip();