java - 多屏幕java小程序的按钮不起作用

Question

我正在制作一个有 2 个屏幕的程序，一个标题和一个游戏屏幕。如果用户单击“播放”，他们可以进入下一个屏幕。但是，在下一个屏幕上，如果用户尝试按“继续”按钮，则不会发生任何情况。我想知道这是为什么以及是否有人可以解决它。谢谢，这是我的代码:

import java.applet.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class ZombieDice extends Applet implements ActionListener
{
Panel p_card;
Panel card1, card2;
CardLayout cdLayout = new CardLayout ();

int shotguns = 0;
int brains = 0;
int p1b = 0;
int p2b = 0;

JLabel pic1;
JLabel pic2;
JLabel pic3;

public void init ()
{
    p_card = new Panel ();
    p_card.setLayout (cdLayout);
    screen1 ();
    screen2 ();
    resize (600, 500);
    setLayout (new BorderLayout ());
    add ("Center", p_card);
}


public void screen1 ()
{
    card1 = new Panel ();
    JLabel logo = new JLabel (createImageIcon ("logo.jpg"));

    JButton play = new JButton (createImageIcon ("play.jpg"));
    play.setActionCommand ("2");
    play.addActionListener (this);

    JButton quit = new JButton (createImageIcon ("quit.jpg"));
    quit.setActionCommand ("quit");
    quit.addActionListener (this);

    card1.add (logo);
    card1.add (play);
    card1.add (quit);
    setBackground (Color.red);

    p_card.add ("1", card1);
}


public void screen2 ()
{
    card2 = new Panel ();
    JLabel player = new JLabel ("Player 1             ");
    player.setFont (new Font ("Vinque", Font.BOLD, 20));

    JLabel shotgun = new JLabel ("Shotguns: " + shotguns + "          ");
    shotgun.setFont (new Font ("Vinque", Font.BOLD, 14));
    JLabel brain = new JLabel ("Braaainss: " + brains);
    brain.setFont (new Font ("Vinque", Font.BOLD, 14));

    JLabel p1brains = new JLabel ("Player 1 Ate: " + p1b + " Braaiinnss            ");
    p1brains.setFont (new Font ("Vinque", Font.BOLD, 16));

    JLabel p2brains = new JLabel ("Player 2 Ate: " + p2b + " Braaiinnss");
    p2brains.setFont (new Font ("Vinque", Font.BOLD, 16));

    pic1 = new JLabel (createImageIcon ("zombie.jpg"));
    pic2 = new JLabel (createImageIcon ("zombie.jpg"));
    pic3 = new JLabel (createImageIcon ("zombie.jpg"));

    JButton keepgoing = new JButton (createImageIcon ("keepgoing.jpg"));
    keepgoing.addActionListener (this);
    keepgoing.setActionCommand ("kg");

    JButton stopscore = new JButton (createImageIcon ("stopAndScore.jpg"));
    keepgoing.addActionListener (this);
    keepgoing.setActionCommand ("ss");

    JButton nextplayer = new JButton (createImageIcon ("nextPlayer.jpg"));
    nextplayer.addActionListener (this);
    nextplayer.setActionCommand ("np");

    card2.add (player);
    card2.add (shotgun);
    card2.add (brain);
    card2.add (p1brains);
    card2.add (p2brains);
    card2.add (pic1);
    card2.add (pic2);
    card2.add (pic3);
    card2.add (keepgoing);
    card2.add (stopscore);
    card2.add (nextplayer);

    p_card.add ("2", card2);
}


public void actionPerformed (ActionEvent e)
{
    if (e.getActionCommand ().equals ("2"))
        cdLayout.show (p_card, "2");

    if (e.getActionCommand ().equals ("kg"))
    {
        int n = (int) ((Math.random () * 9) + 1);
        {
            if (n == 1)
                pic1.setIcon (createImageIcon ("greenBrain.jpg"));
            else if (n == 2)
                pic1.setIcon (createImageIcon ("greenFootPrints.jpg"));
            else if (n == 3)
                pic1.setIcon (createImageIcon ("greenShotGun.jpg"));
            else if (n == 4)
                pic1.setIcon (createImageIcon ("redBrain.jpg"));
            else if (n == 5)
                pic1.setIcon (createImageIcon ("redFootPrints.jpg"));
            else if (n == 6)
                pic1.setIcon (createImageIcon ("redShotGun.jpg"));
            else if (n == 7)
                pic1.setIcon (createImageIcon ("yellowBrain.jpg"));
            else if (n == 8)
                pic1.setIcon (createImageIcon ("yellowFootPrints.jpg"));
            else
                pic1.setIcon (createImageIcon ("yellowShotGun.jpg"));
        }
        int n2 = (int) ((Math.random () * 9) + 1);
        {
            if (n2 == 1)
                pic2.setIcon (createImageIcon ("greenBrain.jpg"));
            else if (n2 == 2)
                pic2.setIcon (createImageIcon ("greenFootPrints.jpg"));
            else if (n2 == 3)
                pic2.setIcon (createImageIcon ("greenShotGun.jpg"));
            else if (n2 == 4)
                pic2.setIcon (createImageIcon ("redBrain.jpg"));
            else if (n2 == 5)
                pic2.setIcon (createImageIcon ("redFootPrints.jpg"));
            else if (n2 == 6)
                pic2.setIcon (createImageIcon ("redShotGun.jpg"));
            else if (n2 == 7)
                pic2.setIcon (createImageIcon ("yellowBrain.jpg"));
            else if (n2 == 8)
                pic2.setIcon (createImageIcon ("yellowFootPrints.jpg"));
            else
                pic2.setIcon (createImageIcon ("yellowShotGun.jpg"));
        }
        int n3 = (int) ((Math.random () * 9) + 1);
        if (n3 == 1)
            pic3.setIcon (createImageIcon ("greenBrain.jpg"));
        else if (n3 == 2)
            pic3.setIcon (createImageIcon ("greenFootPrints.jpg"));
        else if (n3 == 3)
            pic3.setIcon (createImageIcon ("greenShotGun.jpg"));
        else if (n3 == 4)
            pic3.setIcon (createImageIcon ("redBrain.jpg"));
        else if (n3 == 5)
            pic3.setIcon (createImageIcon ("redFootPrints.jpg"));
        else if (n3 == 6)
            pic3.setIcon (createImageIcon ("redShotGun.jpg"));
        else if (n3 == 7)
            pic3.setIcon (createImageIcon ("yellowBrain.jpg"));
        else if (n3 == 8)
            pic3.setIcon (createImageIcon ("yellowFootPrints.jpg"));
        else
            pic3.setIcon (createImageIcon ("yellowShotGun.jpg"));
    }
}


protected static ImageIcon createImageIcon (String path)
{
    java.net.URL imgURL = ZombieDice.class.getResource (path);
    if (imgURL != null)
    {
        return new ImageIcon (imgURL);
    }
    else
    {
        System.err.println ("Couldn't find file: " + path);
        return null;
    }
}
}

Answer 1

也许你应该仔细看看这两个 block ......

JButton keepgoing = new JButton("kg", createImageIcon("keepgoing.jpg"));
keepgoing.addActionListener(this);
keepgoing.setActionCommand("kg");


JButton stopscore = new JButton("ss", createImageIcon("stopAndScore.jpg"));
keepgoing.addActionListener(this);
keepgoing.setActionCommand("ss");

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