JLayeredPane格式問題

Question

我有一個問題，我的JLayeredPane，我可能做了一些令人難以置信的簡單但我不能包圍我的頭。我遇到的問題是所有組件都合併在一起，並沒有訂購。你能否糾正這一點，因爲我不知道。我試圖做的順序是有這樣

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輸出

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LABEL1（後面）
輸入（前）

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import java.awt.BorderLayout; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 
import java.io.IOException; 

import javax.swing.ImageIcon; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JTextArea; 
import javax.swing.JTextField; 

public class window extends JFrame implements KeyListener { 
/** 
* 
*/ 
private static final long serialVersionUID = 7092006413113558324L; 
private static int NewSize; 
public static String MainInput; 
public static JLabel label1 = new JLabel(); 
public static JTextField input = new JTextField(10); 
public static JTextArea output = new JTextArea(main.Winx, NewSize); 

public window() { 
    super("Satine. /InDev-01/"); 
    JLabel label1; 
    NewSize = main.Winy - 20; 
    setLayout(new BorderLayout()); 
    output.setToolTipText(""); 
    add(input, BorderLayout.PAGE_END); 
    add(output, BorderLayout.CENTER); 
    input.addKeyListener(this); 
    input.requestFocus(); 
    ImageIcon icon = new ImageIcon("C:\\Users\\" + System.getProperty("user.name") + "\\AppData\\Roaming\\.Satine\\img\\textbox.png", "This is the desc"); 
    label1 = new JLabel(icon); 
    add(label1, BorderLayout.PAGE_END); 
} 
public void keyPressed(KeyEvent e) { 
    int key = e.getKeyCode(); 
    if (key == KeyEvent.VK_ENTER) { 
     try { 
      MainMenu.start(); 
     } catch (IOException e1) { 
      System.out.print(e1.getCause()); 
     } 
    } 
} 


@Override 
public void keyReleased(KeyEvent e) { 
} 

@Override 
public void keyTyped(KeyEvent e) { 
} 

} 

以及佈局主類。

import java.awt.Container; 
import java.io.IOException; 

import javax.swing.JFrame; 
import javax.swing.JLayeredPane; 


public class main { 
public static int Winx, Winy; 
private static JLayeredPane lpane = new JLayeredPane(); 
public static void main(String[] args) throws IOException{ 
    Winx = window.WIDTH; 
    Winy = window.HEIGHT; 
    window Mth= new window(); 
    Mth.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    Mth.setSize(1280,720); 
    Mth.setVisible(true); 
    lpane.add(window.label1); 
    lpane.add(window.input); 
    lpane.add(window.output); 
    lpane.setLayer(window.label1, 2, -1); 
    lpane.setLayer(window.input, 1, 0); 
    lpane.setLayer(window.output, 3, 0); 
    Mth.pack(); 
} 
    } 

謝謝你的時間，我不希望代碼是爲我寫的，我想要的只是提示我出錯的地方。

Answer 1

我建議您不要使用JLayeredPane作爲GUI的整體佈局。使用BoxLayout或BorderLayout，然後只在需要分層的地方使用JLayeredPane。另外，向JLayeredPane添加組件時，請使用帶有Component和Integer的add方法。請勿撥打add(...)，然後撥打setLayer(...)。

編輯：你可以使用setLayer(...)。我從來沒有使用過，但是根據API，它是設置圖層的一種方法。

例如，

import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.Font; 
import java.awt.GridBagLayout; 
import java.awt.image.BufferedImage; 
import java.io.IOException; 
import java.net.MalformedURLException; 
import java.net.URL; 

import javax.imageio.ImageIO; 
import javax.swing.*; 

public class LayeredPaneFun extends JPanel { 
    public static final String IMAGE_PATH = "http://duke.kenai.com/" + 
     "misc/Bullfight.jpg"; 

    public LayeredPaneFun() { 
     try { 
     BufferedImage img = ImageIO.read(new URL(IMAGE_PATH)); 
     ImageIcon icon = new ImageIcon(img); 
     JLabel backgrndLabel = new JLabel(icon); 
     backgrndLabel.setSize(backgrndLabel.getPreferredSize()); 

     JPanel forgroundPanel = new JPanel(new GridBagLayout()); 
     forgroundPanel.setOpaque(false); 

     JLabel fooLabel = new JLabel("Foo"); 
     fooLabel.setFont(fooLabel.getFont().deriveFont(Font.BOLD, 32)); 
     fooLabel.setForeground(Color.cyan); 
     forgroundPanel.add(fooLabel); 
     forgroundPanel.add(Box.createRigidArea(new Dimension(50, 50))); 
     forgroundPanel.add(new JButton("bar")); 
     forgroundPanel.add(Box.createRigidArea(new Dimension(50, 50))); 
     forgroundPanel.add(new JTextField(10)); 
     forgroundPanel.setSize(backgrndLabel.getPreferredSize()); 

     JLayeredPane layeredPane = new JLayeredPane(); 
     layeredPane.setPreferredSize(backgrndLabel.getPreferredSize()); 
     layeredPane.add(backgrndLabel, JLayeredPane.DEFAULT_LAYER); 
     layeredPane.add(forgroundPanel, JLayeredPane.PALETTE_LAYER); 

     setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS)); 
     add(new JScrollPane(new JTextArea("Output", 10, 40))); 
     add(layeredPane); 

     } catch (MalformedURLException e) { 
     e.printStackTrace(); 
     System.exit(1); 
     } catch (IOException e) { 
     e.printStackTrace(); 
     System.exit(1); 
     } 
    } 

    private static void createAndShowGui() { 
     JFrame frame = new JFrame("LayeredPaneFun"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.getContentPane().add(new LayeredPaneFun()); 
     frame.pack(); 
     frame.setLocationRelativeTo(null); 
     frame.setVisible(true); 
    } 

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