多屏幕Java小程序具有不起作用的按钮

我正在制作一个有2个屏幕，标题和游戏画面的程序。 如果用户点击“播放”，他们可以进入下一个屏幕。 但是，如果用户试图按下“Keep Going”按钮，则在下一个屏幕上，没有任何反应。 我想知道为什么会这样，如果有人能解决它。 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街区……

 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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