OO设计和循环依赖

您可以通过添加警卫人员来检查团队是否仍然有该球员/该球员仍在团队中，从而打破循环依赖。例如：

在课堂上

Team

public void removePlayer(Player player) {    if (players.contains(player))    {        players.remove(player);        player.leaveTeam();        // Do other admin work when a player leaves    }}

在课堂上

Player

public void leaveTeam() {    if (team != null)    {        team.removePlayer(this);        team = null;        // Do some more player stuff..    }}