Java Swing接口問題

Question

這是我遇到過的最奇怪的錯誤。 每當我啟動程序時，大約2次中的1次，GUI就會成功創建並彈出。 在另外2次中的1次中，我沒有gui，也沒有錯誤，並且所有代碼均以與成功創建gui時相同的順序執行。

是什么導致此錯誤？ 我該如何解決呢？ 我一無所有

視圖類：

    package view;

import controller.GameController;
import lombok.Data;
import model.GameModel;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

    @Data public class View extends JFrame {

        GameInterface gameInterface = new GameInterface();
        MainMenuScreen menuScreen = new MainMenuScreen();

        public View() {
            super("View");
            setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            displayMenuScreen();
            setVisible(true);
        }

        public void displayMenuScreen(){
            menuScreen.getSTARTTHEGAMEButton().addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    GameModel.getInstance().newGame();
                    displayGameInterface();
                    GameController.startGame();
                }
            });
            setContentPane(menuScreen.getContentPane());
        }

        public void displayGameInterface(){
            setContentPane(gameInterface.getContentPane());
        }
    }

主菜單類：

package view;
import lombok.Data;
import javax.swing.*;

@Data public class MainMenuScreen extends JFrame{
    private JButton STARTTHEGAMEButton;
    private JPanel rootPanelMainMenu;
    private JTextPane crazyBananaRepublicTycoonTextPane;

    public MainMenuScreen() {
        super("MY GAME'S NAME");
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setContentPane(rootPanelMainMenu);
        System.out.println("HEYHEY3");

    }
}

創建視圖的類：

import model.GameModel;
import model.GameModelObserver;
import view.View;

public class CrazyBananaRepublicTycoon {

        public static final void main(String args[]){
            View view = new View();
            view.setVisible(true);
            GameModelObserver gameModelObserver = new GameModelObserver(view.getGameInterface());
            GameModel.getInstance().addObserver(gameModelObserver);
            GameModel.getInstance().setGameModelObserver(gameModelObserver);
        }
    }

Answer 1

您沒有正確使用事件調度線程...

您只能通過EDT與大多數Swing / AWT對象進行交互。

更改您的主要方法：

public static final void main(String args[])  {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            View view = new View();
            view.setVisible(true);
            GameModelObserver gameModelObserver = new GameModelObserver(view.getGameInterface());
            GameModel.getInstance().addObserver(gameModelObserver);
            GameModel.getInstance().setGameModelObserver(gameModelObserver);
        }
    }
}