Question

我想通过反对信标发送一个类别物体:(Packet is Serializable)

public class ServerPlayersListPacket extends Packet {

    private static final long serialVersionUID = -7141960214853425631L;

    private ArrayList<Player> players;


    public ServerPlayersListPacket(ArrayList<Player> players) {
        this.setPlayers(players);
    }


    public ArrayList<Player> getPlayers() {
        return new ArrayList<Player>(Collections.synchronizedList(players));
    }


    public void setPlayers(ArrayList<Player> players) {
        this.players = players;
    }
}

但<代码>ArrayList仍有问题。在从另一个网站(I)检索时,OptionalDataException。

我发现这个问题与<代码>ArrayList同步。但它如何发挥作用?

Answer 1

My trick is:

send initial packet ServerPlayersListInitPacket
send ServerNextPlayerPacket in loop with one Player per Packet

This solution also allows client site to update players list dynamically which is more smooth.

Answer 2

ArrayList没有同步。病媒。
若要把你纳入主流,就必须有序列可循,而不是同步。通过“透明”转向不同领域,因此,你发现问题。

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