Java Reference
In-Depth Information
*/
public static <E extends Comparable<E>>
ArrayList<E> dealHand(List<E> deck, int n) {
int deckSize = deck.size();
List<E> handView = deck.subList(deckSize - n, deckSize);
ArrayList<E> hand = new ArrayList<E>(handView);
handView.clear();
Collections.sort(hand);
return hand;
}
}
The program produces the output:
java Deal 4 3
[DEUCE of CLUBS, SEVEN of CLUBS, QUEEN of DIAMONDS]
[NINE of HEARTS, FIVE of SPADES, ACE of SPADES]
[THREE of HEARTS, SIX of HEARTS, TEN of SPADES]
[TEN of CLUBS, NINE of DIAMONDS, THREE of SPADES]
Example 8.9.2-4. Enum Constants with Class Bodies
enum Operation {
PLUS {
double eval(double x, double y) { return x + y; }
},
MINUS {
double eval(double x, double y) { return x - y; }
},
TIMES {
double eval(double x, double y) { return x * y; }
},
DIVIDED_BY {
double eval(double x, double y) { return x / y; }
};
// Each constant supports an arithmetic operation
abstract double eval(double x, double y);
public static void main(String args[]) {
double x = Double.parseDouble(args[0]);
double y = Double.parseDouble(args[1]);
for (Operation op : Operation.values())
System.out.println(x + " " + op + " " + y +
" = " + op.eval(x, y));
