java - 从客户端读取对象时出现 java.lang.ExceptionInInitializerError

Question

我正在尝试使用 javaFX 制作多人国际象棋游戏，当 player1 尝试在服务器中发送游戏请求时，将出现此异常

Exception in thread "Thread-1" java.lang.ExceptionInInitializerError 
    at java.io.ObjectStreamClass.computeDefaultSUID(ObjectStreamClass.java:1887)
    at java.io.ObjectStreamClass.access$100(ObjectStreamClass.java:79) 
    at java.io.ObjectStreamClass$1.run(ObjectStreamClass.java:263) 
    at java.io.ObjectStreamClass$1.run(ObjectStreamClass.java:261) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.io.ObjectStreamClass.getSerialVersionUID(ObjectStreamClass.java:260) 
    at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:682) 
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1880) 
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1746) 
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2037) 
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568) 
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282) 
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206) 
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064) 
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568) 
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282) 
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206) 
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064) 
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568) 
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282) 
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206) 
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064) 
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568) 
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428) 
    at ServerSide.ClientHandler.newGameRequest(ClientHandler.java:142) 
    at ServerSide.ClientHandler.run(ClientHandler.java:62) 
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: Toolkit not initialized
    at com.sun.javafx.application.PlatformImpl.runLater (PlatformImpl.java:273)
    at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:268)
    at com.sun.javafx.application.PlatformImpl.setPlatformUserAgentStylesheet(PlatformImpl.java:550)
    at com.sun.javafx.application.PlatformImpl.setDefaultPlatformUserAgentStylesheet(PlatformImpl.java:512)
    at javafx.scene.control.Control.<clinit>(Control.java:87)
... 34 more

这是代码，异常在 game = (Game) ois.readObject();

SimpleUser requestedUser = (SimpleUser) ois.readObject();
game = (Game) ois.readObject();
for (ClientHandler clientHandler : Server.getActiveClients()) {
    if (clientHandler.user.getSimpleUser().equals(requestedUser)) {
        pairedClientHandler = clientHandler;
        pairedClientHandler.getIncomingGameRequests().add(game);
        break;
    }
}

这是游戏类

package ClientSide.Game;

import General.User.Audience;
import General.User.Player;
import General.User.SimpleUser;

import java.io.Serializable;;
import java.util.ArrayList;

public class Game implements Serializable {
    private Board board;
    private Player player1;
    private Player player2;
    private SimpleUser winner;
    private SimpleUser loser;
    private boolean isDraw;

    ArrayList<Audience> audiences;
    private ArrayList<Move> moves;
    private boolean isRated;
    private boolean isPlayer2Accepted;
    private int time;

    public Board getBoard() {
        return board;
    }

    public Player getPlayer1() {
        return player1;
    }

    public void setPlayer1(Player player1) {
        this.player1 = player1;
    }

    public void setPlayer2(Player player2) {
        this.player2 = player2;
    }

    public Player getPlayer2() {
        return player2;
    }

    public boolean isPlayer2Accepted() {
        return isPlayer2Accepted;
    }

    public void setPlayer2Accepted(boolean player2Accepted) {
        isPlayer2Accepted = player2Accepted;
    }

    public ArrayList<Move> getMoves() {
        return moves;
    }

    public Game() {

    }

    public Game(Player player1, Player player2, boolean isRated) {
        this.player1 = player1;
        this.player2 = player2;
        this.isRated = isRated;
    }  

    {
        board = new Board(this);
        moves = new ArrayList<>();
    }

    public SimpleUser getWinner() {
        return winner;
    }

    public void setWinner(SimpleUser winner) {
        this.winner = winner;
    }

    public SimpleUser getLoser() {
        return loser;
    }

    public void setLoser(SimpleUser loser) {
        this.loser = loser;
    }

    public boolean isDraw() {
        return isDraw;
    }

    public void setDraw(boolean draw) {
        isDraw = draw;
    } 

    public int getTime() {
        return time;
    }

    public boolean isRated() {
        return isRated;
    }
}

标签： javajavafx

Answer 1

您的可序列化类必须指定一个 UUID，并且此 UUId 在线程/网络对象流之间必须相同，尝试为您的代码中的每个 Serializable 指定一个，然后再试一次：

private static final long serialVersionUID = SOME_LONG_HERE;