的Java：添加背景图像帧

Question

可能重复：
java swing background image
drawing your own buffered image on frame

我想一回地面图像添加到我的框架，但没有什么我也做作品。

我设计了一个由多个面板组成的老虎机添加到容器。现在，我正在尝试为框架添加一个不错的背景。

我试过使用paint方法。但是，由于我已经使用绘画方法绘制了卷轴图像，因此它不适用于背景。

我也尝试添加JLabel，但是当我这样做时，它会覆盖所有内容或被覆盖，具体取决于我如何调用它。以下是我的代码;任何帮助将非常感激：

import javax.swing.event.*; 
import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 
import java.io.*; 
import sun.audio.*; 

public class SlotMachine extends JFrame { 

    private Container c = getContentPane(); 

    private ImageIcon handleIcon = new ImageIcon("starWars/slot-handle.png"); 
    private ImageIcon quitIcon = new ImageIcon("starWars/quit2.jpg"); 
    private ImageIcon logoIcon = new ImageIcon("starWars/logo3.jpg"); 
    private ImageIcon BG = new ImageIcon("space.jpg"); 
    private JButton spin = new JButton("Spin", handleIcon); 
    private JButton quit = new JButton("Quit", quitIcon); 
    private JLabel logo = new JLabel(logoIcon); 
    private JLabel bankTotal = new JLabel("Empire Total"); 
    private JLabel bankLabel = new JLabel("$1000.00"); 
    private JLabel playerLabel = new JLabel("$1000.00"); 
    private JLabel playerTotal = new JLabel("Rebellion Total"); 
    private Font newFont = new Font("DialogInput",Font.ITALIC, 25); 
    private JPanel logoPanel = new JPanel(new BorderLayout()); 
    private JPanel moneyPanel = new JPanel(new GridLayout(1, 3, 5, 5)); 
    private JPanel imagePanel; 
    private JPanel mainPanel = new JPanel(new BorderLayout()); 
    private JPanel bankPanel = new JPanel(new GridLayout(2, 1, 5, 5)); 
    private JPanel playerPanel = new JPanel(new GridLayout(2, 1, 5, 5)); 
    private JPanel panel = new JPanel(new FlowLayout()); 
    private SlotMachine.ReelPanel reel1 = new SlotMachine.ReelPanel(); 
    private SlotMachine.ReelPanel reel2 = new SlotMachine.ReelPanel(); 
    private SlotMachine.ReelPanel reel3 = new SlotMachine.ReelPanel(); 
    private AudioPlayer audioPlayer = AudioPlayer.player; 
    private AudioDataStream continuousMusic; 
    private AudioDataStream winMusic; 
    private AudioDataStream force; 
    private AudioDataStream force2; 
    //private AudioDataStream intro; 
    private ContinuousAudioDataStream audioLoop; 
    private static final int DELAY = 1000; 
    private static final double FUNDS = 1000.00; 
    private static final float PRICE = 1; 
    private int timerCounter = 0; 
    private double bank = FUNDS; 
    private double playerMoney = 1000.00; 
    private Timer timer = new Timer(DELAY, new SlotMachine.TimeHandler()); 


public SlotMachine() { 

     try { 
      FileInputStream inputStream = new FileInputStream(new File("cantina4.wav")); 
      AudioStream audioStream = new AudioStream(inputStream); 
      AudioData audioData = audioStream.getData(); 
      continuousMusic = new AudioDataStream(audioData);    
      audioLoop = new ContinuousAudioDataStream(audioData); 

      inputStream = new FileInputStream(new File("Cheer.wav")); 
      audioStream = new AudioStream(inputStream); 
      audioData = audioStream.getData(); 
      winMusic = new AudioDataStream(audioData); 

      inputStream = new FileInputStream(new File("forceNN.wav")); 
      audioStream = new AudioStream(inputStream); 
      audioData = audioStream.getData(); 
      force = new AudioDataStream(audioData); 

      inputStream = new FileInputStream(new File("force2NN.wav")); 
      audioStream = new AudioStream(inputStream); 
      audioData = audioStream.getData(); 
      force2 = new AudioDataStream(audioData); 


     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

     audioPlayer.start(force);   

     // Set the font 
     spin.setFont(newFont); 
     quit.setFont(newFont); 
     bankLabel.setFont(newFont); 
     bankTotal.setFont(newFont); 
     playerLabel.setFont(newFont); 
     playerTotal.setFont(newFont); 

     // implements start button 
     spin.setVerticalTextPosition(SwingConstants.BOTTOM); 
     spin.setHorizontalTextPosition(SwingConstants.CENTER); 
     spin.setBackground(Color.GREEN); 
     spin.setForeground(Color.WHITE); 
     spin.setPreferredSize(new Dimension(100, 370)); 
     spin.addActionListener(new ActionListener() { 
      public void actionPerformed(ActionEvent evt) { 
       audioPlayer.stop(force); 
       audioPlayer.stop(force2); 
       timer.start(); 
       reel1.startAnimation(); 
       reel2.startAnimation(); 
       reel3.startAnimation(); 
       spin.setEnabled(false); 
       audioPlayer.start(audioLoop); 
      } 
     }); 
     // implements quit button  
     quit.setBackground(Color.RED); 
     quit.setForeground(Color.WHITE); 
     quit.addActionListener(new ActionListener() { 
      public void actionPerformed(ActionEvent evt) { 
       spin.setEnabled(true); 
       reel1.stopAnimation(); 
       reel2.stopAnimation(); 
       reel3.stopAnimation(); 
       timer.stop(); 
       audioPlayer.stop(continuousMusic); 
       audioPlayer.stop(audioLoop); 
       audioPlayer.stop(winMusic); 
       timerCounter = 0; 
       audioPlayer.stop(force); 
       audioPlayer.start(force2); 
       imagePanel.repaint(); // without this call for repaint, if you press quit but then choose to cancel 
       // the curent image and the next image would sometimes overlap this repaint may change the images but they do not overlap. 
       if (JOptionPane.showConfirmDialog(SlotMachine.this, 
         "Are you sure you want to quit?", "Quit Option", 
         JOptionPane.OK_CANCEL_OPTION) == 0) { 
        audioPlayer.start(force2); 
        System.exit(0); 
       } 
      } 
     }); 
     // create image panel 
     imagePanel = new JPanel(new GridLayout(1, 3, 15, 15)); 
     imagePanel.setBackground(Color.WHITE); 
     imagePanel.add(reel1); 
     imagePanel.add(reel2); 
     imagePanel.add(reel3); 

     // create a panel to hold bank values 
     bankTotal.setForeground(Color.WHITE); 
     bankLabel.setForeground(Color.WHITE); 
     bankPanel.setBackground(Color.GRAY); 
     bankPanel.add(bankTotal); 
     bankPanel.add(bankLabel); 

     // panel to hold player values 
     playerTotal.setForeground(Color.WHITE); 
     playerLabel.setForeground(Color.WHITE); 
     playerPanel.setBackground(Color.GRAY); 
     playerPanel.add(playerTotal); 
     playerPanel.add(playerLabel); 

     // create a panel to add bank and player panels and quit button 
     //moneyPanel.setBackground(Color.BLACK); 
     moneyPanel.add(bankPanel); 
     moneyPanel.add(playerPanel); 
     moneyPanel.add(quit); 
     moneyPanel.setOpaque(false); 

     // this panel adds the reel panel and spin button 
     panel.setPreferredSize(new Dimension(650, 350)); 
     //panel.setBackground(Color.BLACK); 
     panel.add(imagePanel); 
     panel.add(spin); 
     panel.setOpaque(false); 

     // create the logo panel 
     logoPanel.add(logo); 
     //logoPanel.setBackground(Color.BLACK); 
     logoPanel.setOpaque(false);   

     mainPanel.add(logoPanel, BorderLayout.NORTH); 
     mainPanel.add(panel, BorderLayout.CENTER); 
     mainPanel.add(moneyPanel, BorderLayout.SOUTH); 
     mainPanel.setOpaque(false);    

     //////////////////////////////////// background ??????????????????? 
     /// I could just set backgroung black but i want to add a image 


     add(mainPanel, BorderLayout.CENTER); 

     setTitle("Slot Machine"); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     setVisible(true); 
     setSize(950, 750); 
     setResizable(false); 
     setLocationRelativeTo(null);      

    } 

    public static void main(String[] args) { 
     new SlotMachine(); 
    } 

    public class ReelPanel extends JPanel { 

     private final static String IMAGE_NAME = "starWars/icon"; 
     protected ImageIcon images[]; 
     private int currentImage = 0; 
     private final int ANIMATION_DELAY = 150; 
     private final int TOTAL_IMAGES = 12; 
     private int width; 
     private int height; 
     private Timer animationTimer = new Timer(ANIMATION_DELAY, new SlotMachine.ReelPanel.TimerHandler()); 
     private int index; 

     public ReelPanel() { 
      try { 
       images = new ImageIcon[TOTAL_IMAGES]; 
       for (int count = 0; count < images.length; count++) { 
        images[ count] = new ImageIcon(IMAGE_NAME + (count + 1) + ".jpg"); 
       } 

       width = images[ 1].getIconWidth(); 
       height = images[ 1].getIconHeight(); 
       currentImage = 0; 
       index = 0; 
       animationTimer.setInitialDelay(0); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 

     public void paintComponent(Graphics g) { 

      super.paintComponent(g); 

      images[ currentImage].paintIcon(this, g, 0, 0); 

      if (animationTimer.isRunning()) { 
       currentImage = (int) (Math.random() * TOTAL_IMAGES); 
      } 
     } 

     public void startAnimation() { 

      animationTimer.start(); 
     } 

     public void stopAnimation() { 
      animationTimer.stop(); 
     } 

     public int getIndex() { 
      return index; 
     } 

     public Dimension getMinimumSize() { 
      return getPreferredSize(); 
     } 

     public Dimension getPreferredSize() { 
      return new Dimension(width, height); 
     } 

     private class TimerHandler implements ActionListener { 

      public void actionPerformed(ActionEvent actionEvent) { 
       repaint(); 
       index = currentImage; 
      } 
     } 
    } 

    private class TimeHandler implements ActionListener { 

     public void actionPerformed(ActionEvent actionEvent) { 
      audioPlayer.stop(winMusic); 
      ++timerCounter; 
      if (timerCounter == 2) { 
       reel1.stopAnimation(); 
      } else if (timerCounter == 3) { 
       reel2.stopAnimation(); 
      } else if (timerCounter == 4) { 
       reel3.stopAnimation(); 
       audioPlayer.stop(continuousMusic); 
       audioPlayer.stop(audioLoop); 
       timerCounter = 0; 
       timer.stop(); 
       spin.setEnabled(true); 
       if (reel1.getIndex() == reel2.getIndex() && reel1.getIndex() == reel3.getIndex()) { 
        if (playerMoney > 0) { 
         playerMoney += bank; 
        } else { 
         playerMoney = bank; 
        } 
        bank = FUNDS; 
        winMusic.reset(); 
        audioPlayer.start(winMusic); 
       } else { 
        bank += PRICE; 
        playerMoney -= PRICE; 
       } 

       bankLabel.setText("$" + bank + 0); 
       playerLabel.setText("$" + playerMoney + 0); 
       if (playerMoney <= 0) { 
        JOptionPane.showMessageDialog(SlotMachine.this, 
          "You are out of funds. GAME IS OVER", "Error", JOptionPane.ERROR_MESSAGE); 
        System.exit(1); 
       } 
      } 
     } 
    } 
} 

Answer 1

1. 设置你的主面板的布局BorderLayout
2. 创建JLabel并将其添加到您主面板
3. 使用背景图片
4. 设置设置标签的图像图标标签的布局以便您想要使用
5. 继续将组件添加到标签中，就像您通常会使用的那样

一个例子可以发现here

Answer 2

你可以简单地覆盖paintComponent您mainPanel，并在该方法中绘制背景图像。您应该选择适当的策略来绘制图像（拉伸，保持纵横比，水平/垂直重复），但这不应该太难。

下面是一个在内容窗格中延伸图像的示例。

import java.awt.BorderLayout; 
import java.awt.Graphics; 
import java.net.MalformedURLException; 
import java.net.URL; 

import javax.swing.ImageIcon; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.SwingUtilities; 

public class TestBackgroundImage { 

    private static final String BACKHGROUND_IMAGE_URL = "http://cache2.allpostersimages.com/p/LRG/27/2740/AEPND00Z/affiches/blue-fiber-optic-wires-against-black-background.jpg"; 

    protected void initUI() throws MalformedURLException { 
     JFrame frame = new JFrame(TestBackgroundImage.class.getSimpleName()); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     final ImageIcon backgroundImage = new ImageIcon(new URL(BACKHGROUND_IMAGE_URL)); 
     JPanel mainPanel = new JPanel(new BorderLayout()) { 
      @Override 
      protected void paintComponent(Graphics g) { 
       super.paintComponent(g); 
       g.drawImage(backgroundImage.getImage(), 0, 0, getWidth(), getHeight(), this); 
      } 

     @Override 
     public Dimension getPreferredSize() { 
      Dimension size = super.getPreferredSize(); 
      size.width = Math.max(backgroundImage.getIconWidth(), size.width); 
      size.height = Math.max(backgroundImage.getIconHeight(), size.height); 
      return size; 
     } 

     }; 
     mainPanel.add(new JButton("A button"), BorderLayout.WEST); 
     frame.add(mainPanel); 
     frame.setSize(400, 300); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       try { 
        new TestBackgroundImage().initUI(); 
       } catch (MalformedURLException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
      } 
     }); 
    } 

}