java - 当我导出 Java 程序时，为什么出现框架而不出现面板？

Question

我想将我的游戏导出到 .jar 文件中。它导出；当我运行它时，框架出现了，但面板没有加载。我的框架和面板位于两个不同的类文件中，但我认为这没有什么区别。而且，它在 Eclipse 中完全可以工作。我在 Runnable Jar File 下导出了 .jar 文件，并将所需的库打包到生成的 jar 中。在 SlashRunnerPanel 中，我导入了许多图像并调整了它们的大小。这会是问题所在吗？

这是我的框架代码:

package baseFiles;

import javax.swing.*;

public class SlashRunnerFrame {
  public static void main(String args[]) {
    JFrame frame = new JFrame(); // Create new JFrame (the window)

    frame.setSize(1000, 800); // Set it to 1000x800 pixels
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Quit on red X

    frame.setResizable(false); // Disallow resizing of window

    // Change this line if you want to use a different panel
    SlashRunnerPanel panel = new SlashRunnerPanel();
    frame.add(panel); // Staple the panel to the JFrame
    frame.setVisible(true); // So we can see our window
    panel.mainLoop();
  }
}

这是我的面板代码:

package baseFiles;

import javax.swing.JOptionPane;
import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.awt.image.BufferedImage;
import java.awt.event.*;
import javax.imageio.*;
import java.io.File;
import player.Player;
import surroundings.Obstacle;

public class SlashRunnerPanel extends JPanel implements KeyListener,
ActionListener, MouseListener
{
public static boolean mailbox1 = false;
 Color skin = new Color(255, 223, 196);
boolean goo = true;

BufferedImage origMailBox;
BufferedImage house;
BufferedImage ReplaceableBackgroundPic;
BufferedImage origPlayerBack;
BufferedImage origPlayerFront;
BufferedImage origletter;
BufferedImage blackScreen;
BufferedImage exclamation;
BufferedImage borderRocks;
BufferedImage pause;
Image ReplaceableBackground;
Image resizedHouse;
Image mailbox;
Image PlayerBack;
Image PlayerFront;
Image letter;
Image Exclamation;

ArrayList<Obstacle> obstacles = new ArrayList<Obstacle>();
Obstacle mailboxRegion;
Player player;
Obstacle Beginning;
String ps = System.getProperty("file.separator");

//Animation for walking
boolean aniUp = true;
boolean aniDown;
boolean aniRight;
boolean aniLeft; 
boolean lastAni;

//mail
boolean openMail = false;
boolean isMailbox;
boolean mailcontinue;
boolean arrow = true;
boolean showMailRegion;

//Scene
boolean begin = true;
int cmX;
int cmY;
boolean obstaclesInBeginning = true;
boolean showObstInBegin;

//Keys
boolean showObstacles;
boolean stats;
boolean pausebool;

boolean play = true;

public SlashRunnerPanel()
{   
    try{
    borderRocks = ImageIO.read(new File("src" + ps + "Images" + ps + "Boundary.png"));
    } catch(Exception e) {System.out.println(e.getMessage());}
            try{
            exclamation = ImageIO.read(new File("src" + ps + "Images" + ps + "Exclamation.png"));
            } catch(Exception e) {System.out.println(e.getMessage());}
            try{
            origletter = ImageIO.read(new File("src" + ps + "Images" + ps + "Scroll.png"));
            } catch(Exception e) {System.out.println(e.getMessage());}
            try{
                blackScreen = ImageIO.read(new File("src" + ps + "Images" + ps + "BlackScreen.png"));
            } catch(Exception e) {e.printStackTrace();}
            try{
                house = ImageIO.read(new File("src" + ps + "Images" + ps + "House.png"));
            } catch(Exception e) {e.printStackTrace();}
            try{
                ReplaceableBackgroundPic = ImageIO.read(new File("src" + ps + "Images" + ps + "ReplaceableBackground.png"));
            } catch(Exception e) {e.printStackTrace();}
            try{
                origMailBox = ImageIO.read(new File("src" + ps + "Images" + ps + "SmallMailbox.png"));
            } catch(Exception e) {e.printStackTrace();}
            try{
                origPlayerBack = ImageIO.read(new File("src" + ps + "Images" + ps + "WarriorBack.png"));
            } catch(Exception e) {e.printStackTrace();}
            try{
                origPlayerFront = ImageIO.read(new File("src" + ps + "Images" + ps + "WarriorFront.png"));
            } catch(Exception e) {e.printStackTrace();}
            try{
                pause = ImageIO.read(new File("src" + ps + "Images" + ps + "Pause.png"));
            } catch(Exception e) {e.printStackTrace();}
}

public void mainLoop()
{

    obstacles.add(new Obstacle(140, 170, 300, 545));
    obstacles.add(new Obstacle(560, 170, 350, 500));
    obstacles.add(new Obstacle(500, 900, 800, 100));

    this.setFocusable(true);
    addKeyListener(this);
    addMouseListener(this);
       Exclamation = exclamation.getScaledInstance(20, 20, Image.SCALE_FAST);
       letter = origletter.getScaledInstance(500, 500, Image.SCALE_FAST);
       ReplaceableBackground = ReplaceableBackgroundPic.getScaledInstance(1600, 2336, Image.SCALE_FAST);
       resizedHouse = house.getScaledInstance((int) (getWidth() / 5), (int) (getHeight() / 4), Image.SCALE_FAST);
       mailbox = origMailBox.getScaledInstance((int)(getWidth() / 6), (int) (getHeight() / 6), Image.SCALE_FAST);
       Image PlayerBack = origPlayerBack.getScaledInstance((int)(getWidth() / 30), (int) (getHeight() / 12), Image.SCALE_FAST);
       Image PlayerFront = origPlayerFront.getScaledInstance((int)(getWidth() / 30), (int) (getHeight() / 12), Image.SCALE_FAST);

       player = new Player(585, 725, (int)(getWidth() / 30), (int) (getHeight() / 12), false, PlayerFront, PlayerBack);
       mailboxRegion = new Obstacle(795, 750, 50, 50);
       Beginning = new Obstacle(450, 750, 100, 100);

   while(goo)
   {
        if(player.intersects(Beginning) && obstaclesInBeginning)
            player.playerX += 10;
        if(!player.dead)
       player.move(obstacles); 
       updateCamera();
       if(player.experience == 100)
       {
           player.experience = 0;
           player.experienceLv++;
       }
       checkCondition();
       repaint();
       wait(100);
   }

}

public void wait(int milsec)
{
    try{
        Thread.sleep(milsec);
    } catch(Exception e) {System.out.println(e.getMessage());}
}

public void paintComponent(Graphics g)
{
    super.paintComponent(g);


    if(begin && !pausebool && play) //For beginning
    {
        g.drawImage(ReplaceableBackground, 150 - cmX, -620 - cmY, null);
        g.drawImage(resizedHouse, 600 - cmX, 563 - cmY, null);
        g.drawImage(mailbox, 720 - cmX, 670 - cmY, null);
        g.drawImage(pause,  900, 10, null);
        if(obstaclesInBeginning)
            g.drawImage(borderRocks,523 - cmX,755 - cmY,null);
    }

    if(pausebool)
    {
        g.drawRect(0,  0,  1000,  1000);
    }

    if(arrow                                                                  )
    {
        g.drawImage(Exclamation, 790 - cmX, 665 - cmY, null);
    }
    player.drawTo(g, 500, 450);


    if(isMailbox)
    {
        g.setColor(Color.magenta);
        g.setFont(new Font("AlgerianBasD", Font.BOLD, 15));
        g.drawString("Press 'Q' to open the mailbox!", 600, 300);
    }

    if(showObstInBegin)
    {
        obstBegin(g);
    }

    if(play)
    {
        g.setColor(Color.black);
        g.fillRect(738, 35, 250, 30);
        g.fillRect(738, 90, 250, 30);
        g.setColor(Color.red);
        g.fillRect(738, 35, (int)(player.playerHealth * 2.5), 30);
        g.setFont(new Font("AlgerianBasD", Font.BOLD, 20));
        g.drawString("Health:", 738, 30);
        g.setColor(new Color(128, 255, 210));
        g.drawString("Experience:", 738, 85);
        g.fillRect(738, 90, (int)(player.experience * 2.5), 30);
        g.setColor(new Color(10, 133, 255));
        g.drawString("" + player.experienceLv, 850, 110);
    }

    if(showObstacles)
    {
            drawObst(g, obstacles);
    }

    if(showMailRegion)
    {
        drawMailRegion(g);
    }

    if(stats)
    {
        g.setColor(Color.yellow);
        g.drawRect(1, 600, 200, 300);
        g.setFont(new Font("AlgerianBasD", Font.PLAIN, 15));
        g.setColor(Color.black);
        g.drawString("Stats:", 50,  620);
        g.setColor(new Color(140, 0, 0));
        g.drawString("Overall Strength: " + player.completeStrength, 3, 650);
        g.setColor(new Color(100, 88, 115));
        g.drawString("Armor: " + player.playerArmor, 3, 680);
        g.setColor(Color.yellow);
        g.drawString("X: " + player.playerX, 3, 710);
        g.drawString("Y: " + player.playerY, 3, 740);
    }

    if(openMail && !mailcontinue)
    {
        g.drawImage(blackScreen,0, 0, null);
        g.drawImage(letter, 250, 200, null);
    }


}

public void checkCondition()
{
       if(player.intersects(mailboxRegion))
       {
           isMailbox = true;

       } if( isMailbox && !player.intersects(mailboxRegion))
       {
           isMailbox = false;
       }
}

public void drawObst(Graphics g, ArrayList<Obstacle> obst)
{
    for(int i = 0; i < obst.size(); i++)
    {
    g.setColor(Color.magenta);
    g.fillRect(obst.get(i).getX() - cmX, obst.get(i).getY() - cmY, obst.get(i).getWidth(), obst.get(i).getHeight());
    }

}

public void drawMailRegion(Graphics g)
{
    g.setColor(Color.cyan);
    g.fillRect(mailboxRegion.getX() - cmX, mailboxRegion.getY() - cmY, mailboxRegion.getWidth(), mailboxRegion.getHeight());
}

public void obstBegin(Graphics g)
{
    g.setColor(Color.ORANGE);
    g.fillRect(Beginning.getX() - cmX, Beginning.getY() - cmY, Beginning.getWidth(), Beginning.getHeight());
}
public void updateCamera()
{
    cmX = player.playerX - getWidth() / 2;
    cmY = player.playerY - getHeight() / 2;
}

  //---------------------------------------------------------------------------------------------------------------------------------------------------------

public void keyPressed(KeyEvent e)
  {
      int key = e.getKeyCode();
      if(key == KeyEvent.VK_L)
      {
          if(stats == true)
          {
              stats = false;
          } else
          stats = true;
      }

      if(isMailbox && !openMail && key == KeyEvent.VK_Q)
      {

          openMail = true;
          isMailbox = false;
          arrow = false;
          obstaclesInBeginning = false;

      }

      else if(openMail && key == KeyEvent.VK_Q)
      {
          obstaclesInBeginning = false;
          openMail = false;
          repaint();
      }

      if(key == KeyEvent.VK_EQUALS)
      {
          if(pausebool)
              pausebool = false;
          else
              pausebool = true;
      }

      if(key == KeyEvent.VK_BACK_SLASH)
      {
          if(showObstacles == true)
          {
              showMailRegion = false;
              showObstacles = false;
              showObstInBegin = false;
          } else {
          showObstacles = true;
          showMailRegion = true;
          showObstInBegin = true;
          }
      }

      if(key == KeyEvent.VK_W)
      {
          player.up = true;
          player.aniUp = true;
          player.aniDown = false;
          player.aniRight = false;
          player.aniLeft = false;

      }
      if(key == KeyEvent.VK_S)
      {
          player.down = true;
          player.aniDown = true;
          player.aniUp = false;
          player.aniRight = false;
          player.aniLeft = false;

      }
      if(key == KeyEvent.VK_A)
      {
          player.left = true;
      }
      if(key == KeyEvent.VK_D)
      {
          player.right = true;
      }
      repaint();
  }

  public void keyReleased(KeyEvent e)
  {
      int key = e.getKeyCode();
      if(key == KeyEvent.VK_W)
      {
          player.up = false;
      }
      if(key == KeyEvent.VK_S)
      {
          player.down = false;
      }
      if(key == KeyEvent.VK_A)
      {
          player.left = false;
      }
      if(key == KeyEvent.VK_D)
      {
          player.right = false;
      }
  }

  public void keyTyped(KeyEvent e)
  {

  }

  //----------------------------------------------------------------------------------------------------------------------------------------------------------------

  public void mousePressed(MouseEvent e)
  {

  }

  public void mouseReleased(MouseEvent e)
  {

  }

  public void mouseEntered(MouseEvent e)
  {

  }

  public void mouseClicked(MouseEvent e)
  {

  }

  public void mouseExited(MouseEvent e)
  {

  }

@Override
public void actionPerformed(ActionEvent e) {
    // TODO Auto-generated method stub
    //NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
}
}

Answer 1

尝试在 Event Dispatch Thread 上运行游戏。 Swing 不是线程安全的；如果您尝试在事件调度线程之外创建和修改控件，那么事情可能不会按您的预期工作；控件不显示是很常见的结果。

EventQueue.invokeLater是在 EDT 上运行任务的最常见方法，如下所示: 打包基本文件；

import javax.swing.*;

public class SlashRunnerFrame
{
  public static void main(String args [])
  {
    EventQueue.invokeLater(new Runnable() {
      @Override
      public void run() {
        JFrame frame = new JFrame(); // Create new JFrame (the window)

        frame.setSize(1000, 800); // Set it to 1000x800 pixels
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Quit on red X

        frame.setResizable(false); // Disallow resizing of window

        // Change this line if you want to use a different panel
        SlashRunnerPanel panel = new SlashRunnerPanel(); 
        frame.add(panel); // Staple the panel to the JFrame
        frame.setVisible(true); // So we can see our window
        panel.mainLoop();
      }
    });
  }
}

如果这不能解决您的问题，那么几乎可以肯定您的问题出在 SlashRunnerPanel 的代码中，而不是此代码中。