Magic numbers are not readable

for (int i = 1; i =< 52; i++) {

j  =  i + randomInt(53 - i) – 1

swapEntries(i, j)

}

Replace with constants.

final int DECKSIZE = 52;

for (int i = 1; i =< DECKSIZE; i++) {

j  =  i + randomInt(DECKSIZE + 1 - i) – 1

swapEntries(i, j)

}