How to use

clear

method

in

mage.cards.Cards

case HAND:
  if (command.getValue().equals("clear")) {
    player.getHand().clear();

@Override
public void leave() {
  this.passed = true;
  this.loses = true;
  this.left = true;
  this.abort();
  //20100423 - 800.4a
  this.hand.clear();
  this.graveyard.clear();
  this.library.clear();
}

@Override
public void mulligan(UUID playerId) {
  Player player = getPlayer(playerId);
  int numCards = player.getHand().size();
  player.getLibrary().addAll(player.getHand().getCards(this), this);
  player.getHand().clear();
  player.shuffleLibrary(null, this);
  int deduction = 1;
  if (freeMulligans > 0) {
    if (usedFreeMulligans.containsKey(player.getId())) {
      int used = usedFreeMulligans.get(player.getId());
      if (used < freeMulligans) {
        deduction = 0;
        usedFreeMulligans.put(player.getId(), used + 1);
      }
    } else {
      deduction = 0;
      usedFreeMulligans.put(player.getId(), 1);
    }
  }
  fireInformEvent(new StringBuilder(player.getLogName())
      .append(" mulligans")
      .append(deduction == 0 ? " for free and draws " : " down to ")
      .append((numCards - deduction))
      .append(numCards - deduction == 1 ? " card" : " cards").toString());
  player.drawCards(numCards - deduction, this);
}

@Override
public void useDeck(Deck deck, Game game) {
  library.clear();
  library.addAll(deck.getCards(), game);
  sideboard.clear();
  for (Card card : deck.getSideboard()) {
    sideboard.add(card);
  }
}

@Override
public void mulligan(UUID playerId) {
  Player player = getPlayer(playerId);
  int numCards = player.getHand().size();
  int numToMulliganTo = numCards;
  player.getLibrary().addAll(player.getHand().getCards(this), this);
  player.getHand().clear();
  player.shuffleLibrary(null, this);
  if (usedMulligans != null) {
    String mulliganCode = "7";
    if (usedMulligans.containsKey(player.getId())) {
      mulliganCode = usedMulligans.get(player.getId());
    }
    numToMulliganTo = getNextMulliganNum(mulliganCode);
    usedMulligans.put(player.getId(), getNextMulligan(mulliganCode));
  }
  fireInformEvent(new StringBuilder(player.getLogName())
      .append(" mulligans to ")
      .append(Integer.toString(numToMulliganTo))
      .append(numToMulliganTo == 1 ? " card" : " cards").toString());
  player.drawCards(numToMulliganTo, this);
}

this.abort = false;
if (!testMode) {
  this.hand.clear();
  this.graveyard.clear();

protected void randomizePlayers(Game game, UUID playerId) {
  for (Player player: game.getState().getPlayers().values()) {
    if (!player.getId().equals(playerId)) {
      int handSize = player.getHand().size();
      player.getLibrary().addAll(player.getHand().getCards(game), game);
      player.getHand().clear();
      player.getLibrary().shuffle();
      for (int i = 0; i < handSize; i++) {
        Card card = player.getLibrary().removeFromTop(game);
        card.setZone(Zone.HAND, game);
        player.getHand().add(card);
      }
    }
    else {
      player.getLibrary().shuffle();                
    }
  }
}

if (!cards.isEmpty()) {
  Card card = cards.getRandom(game);
  cards.clear();
  cards.add(card);

cards.clear();
toLibrary.clear();
for (Permanent permanent: permanentsToBottom) {

  shuffled[r] = temp;
cardsInExilePile.clear();
cardsInExilePile.addAll(Arrays.asList(shuffled));

controller.moveCards(card, Zone.GRAVEYARD, source, game);
card.moveToZone(Zone.GRAVEYARD, source.getSourceId(), game, true);
cards.clear();

if (player.isInGame()) { // only players alive are in the restarted game
  player.getGraveyard().clear();
  player.getHand().clear();
  player.getLibrary().clear();
  for (Card card : game.getCards()) {

if (card.getPower().getValue() > creatureGreatestPower) {
  creatureGreatestPower = card.getPower().getValue();
  cards.clear();
  cards.add(card);
} else {

cards.clear();
cards.addAll(opponent.getGraveyard());
for (UUID cardId : cards) {

int handSize = newPlayer.getHand().size();
newPlayer.getLibrary().addAll(newPlayer.getHand().getCards(mcts), mcts);
newPlayer.getHand().clear();
newPlayer.getLibrary().shuffle();
for (int i = 0; i < handSize; i++) {