请问下面的代码逻辑是怎样的，不明白什么意思

public void haveFinish(int column){
    Point point = this.getLastCardLocation(column);
    PKCard card = (PKCard) this.table.get(point);
    do{
        this.table.remove(point);
        card.moveto(new Point(20 + finish * 10, 580)); 
        pane.setComponentZOrder(card, 1);
        this.table.put(card.getLocation(), card);
        card.setCanMove(false);
        point = this.getLastCardLocation(column);
        if (point == null)
            card = null;
        else
            card = (PKCard) this.table.get(point);
    }
    while (card != null && card.isCardCanMove());
    finish++;

是否存在更新操作，dowhile循环一次次遍历查看，删除旧的，获取新的