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我试图让 JPanel 出现在另一个 JPanel 中。目前，JPanel 位于外部 JFrame 中，并与我的其他 JFrame 一起加载。我希望 JPanel 位于另一个 JPanel 内，因此程序不会打开两个不同的窗口。

这是一张图片：

图片

带有我想要在主游戏框架内的文本日志的小型 JPanel。我已经尝试将面板添加到面板中，panel.add(othePanel). 我已经尝试将它添加到 JFrame frame.add(otherPanel)，. 它只是覆盖其他所有内容并为其提供黑色背景。

如何添加面板、调整大小和移动它？

编辑：

这就是我希望聊天框所在的位置。

这就是我希望聊天框所在的位置。

班级代码：

被排在班级首位。

public static JPanel panel;
public static JTextArea textArea = new JTextArea(5, 30);
public static JTextField userInputField = new JTextField(30);

public static void write(String message) {
    Chatbox.textArea.append("[Game]: " + message + "\n");
    Chatbox.textArea.setCaretPosition(Chatbox.textArea.getDocument()
            .getLength());
    Chatbox.userInputField.setText("");
}

public Chatbox() {
    panel = new JPanel();
    panel.setPreferredSize(new Dimension(220, 40));
    panel.setBackground(Color.BLACK);

    JScrollPane scrollPane = new JScrollPane(textArea);
    scrollPane.setPreferredSize(new Dimension(380, 100));
    textArea.setLineWrap(true);
    textArea.setWrapStyleWord(true);
    textArea.setEditable(false);
    scrollPane
            .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    userInputField.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent event) {
            String fromUser = userInputField.getText();
            if (fromUser != null) {
                textArea.append(Frame.username + ":" + fromUser + "\n");
                textArea.setCaretPosition(textArea.getDocument()
                        .getLength());
                userInputField.setText("");
            }
        }
    });
    panel.add(userInputField, SwingConstants.CENTER);
    panel.add(scrollPane, SwingConstants.CENTER);

    //JFrame frame = new JFrame();
    //frame.add(panel);
    //frame.setSize(400, 170);
    //frame.setVisible(true);
}

主框架类：

    public Frame() {
    frame.getContentPane().remove(loginPanel);
    frame.repaint();

    String capName = capitalizeString(Frame.username);
    name = new JLabel(capName);

    new EnemyHealth("enemyhealth10.png");
    new Health("health10.png");
    new LoadRedCharacter("goingdown.gif");
    new Spellbook();
    new LoadMobs();
    new LoadItems();
    new Background();
    new Inventory();
    new ChatboxInterface();

    frame.setBackground(Color.black);
    Frame.redHealthLabel.setFont(new Font("Serif", Font.PLAIN, 20));
    ticks.setFont(new Font("Serif", Font.PLAIN, 20));
    ticks.setForeground(Color.yellow);
    Frame.redHealthLabel.setForeground(Color.black);

    // Inventory slots
    panel.add(slot1);

    panel.add(name);

    name.setFont(new Font("Serif", Font.PLAIN, 20));
    name.setForeground(Color.white);

    panel.add(enemyHealthLabel);
    panel.add(redHealthLabel);
    panel.add(fireSpellBookLabel);
    panel.add(iceSpellBookLabel);
    panel.add(spiderLabel);
    panel.add(appleLabel);
    panel.add(fireMagicLabel);
    panel.add(swordLabel);

    // Character
    panel.add(redCharacterLabel);

    // Interface
    panel.add(inventoryLabel);
    panel.add(chatboxLabel);

    // Background
    panel.add(backgroundLabel);

    frame.setContentPane(panel);
    frame.getContentPane().invalidate();
    frame.getContentPane().validate();
    frame.getContentPane().repaint();

      //I WOULD LIKE THE LOADING OF THE PANEL SOMEWHERE IN THIS CONSTRUCTOR.

    new ResetEntities();
    frame.repaint();

    panel.setLayout(null);
    Run.loadKeyListener();

    Player.px = Connect.x;
    Player.py = Connect.y;

    new Mouse();

    TextualMenu.rect = new Rectangle(Frame.inventoryLabel.getX() + 80,
            Frame.inventoryLabel.getY() + 100,
            Frame.inventoryLabel.getWidth(),
            Frame.inventoryLabel.getHeight());

    Player.startMessage();
}
4

2 回答 2

5

不要使用静态变量。

不要使用空布局。

使用适当的布局管理器。也许主面板使用了 BorderLayout。然后将主要组件添加到 CENTER，将第二个面板添加到 EAST。第二个面板也可以使用 BorderLayout。然后，您可以根据需要将这两个组件添加到 NORTH、CENTER 或 SOUTH。

于 2013-05-09T15:29:00.307 回答
1

例如，使用自定义边框：

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.RadialGradientPaint;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

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

@SuppressWarnings("serial")
public class FrameEg extends JPanel {
   public static final String FRAME_URL_PATH = "http://th02.deviantart.net/"
         + "fs70/PRE/i/2010/199/1/0/Just_Frames_5_by_ScrapBee.png";
   public static final int INSET_GAP = 120;

   private BufferedImage frameImg;
   private BufferedImage smlFrameImg;

   public FrameEg() {
      try {
         URL frameUrl = new URL(FRAME_URL_PATH);
         frameImg = ImageIO.read(frameUrl);

         final int smlFrameWidth = frameImg.getWidth() / 2;
         final int smlFrameHeight = frameImg.getHeight() / 2;
         smlFrameImg = new BufferedImage(smlFrameWidth, smlFrameHeight,
               BufferedImage.TYPE_INT_ARGB);
         Graphics g = smlFrameImg.getGraphics();
         g.drawImage(frameImg, 0, 0, smlFrameWidth, smlFrameHeight, null);
         g.dispose();

         int top = INSET_GAP;
         int left = top;
         int bottom = top;
         int right = left;
         Insets insets = new Insets(top, left, bottom, right);
         MyBorder myBorder = new MyBorder(frameImg, insets);

         JTextArea textArea = new JTextArea(50, 60);
         textArea.setWrapStyleWord(true);
         textArea.setLineWrap(true);
         for (int i = 0; i < 300; i++) {
            textArea.append("Hello world! How is it going? ");
         }
         setLayout(new BorderLayout(1, 1));
         setBackground(Color.black);

         Dimension prefSize = new Dimension(frameImg.getWidth(),
               frameImg.getHeight());
         JPanel centerPanel = new MyPanel(prefSize);
         centerPanel.setBorder(myBorder);
         centerPanel.setLayout(new BorderLayout(1, 1));
         centerPanel.add(new JScrollPane(textArea), BorderLayout.CENTER);

         MyPanel rightUpperPanel = new MyPanel(new Dimension(smlFrameWidth,
               smlFrameHeight));
         MyPanel rightLowerPanel = new MyPanel(new Dimension(smlFrameWidth,
               smlFrameHeight));
         top = top / 2;
         left = left / 2;
         bottom = bottom / 2;
         right = right / 2;
         Insets smlInsets = new Insets(top, left, bottom, right);
         rightUpperPanel.setBorder(new MyBorder(smlFrameImg, smlInsets));
         rightUpperPanel.setLayout(new BorderLayout());
         rightLowerPanel.setBorder(new MyBorder(smlFrameImg, smlInsets));
         rightLowerPanel.setBackgroundImg(createBackgroundImg(rightLowerPanel
               .getPreferredSize()));

         JTextArea ruTextArea1 = new JTextArea(textArea.getDocument());
         ruTextArea1.setWrapStyleWord(true);
         ruTextArea1.setLineWrap(true);
         rightUpperPanel.add(new JScrollPane(ruTextArea1), BorderLayout.CENTER);

         JPanel rightPanel = new JPanel(new GridLayout(0, 1, 1, 1));
         rightPanel.add(rightUpperPanel);
         rightPanel.add(rightLowerPanel);
         rightPanel.setOpaque(false);
         add(centerPanel, BorderLayout.CENTER);
         add(rightPanel, BorderLayout.EAST);

      } catch (MalformedURLException e) {
         e.printStackTrace();
      } catch (IOException e) {
         e.printStackTrace();
      }
   }

   private BufferedImage createBackgroundImg(Dimension preferredSize) {
      BufferedImage img = new BufferedImage(preferredSize.width,
            preferredSize.height, BufferedImage.TYPE_INT_ARGB);
      Point2D center = new Point2D.Float(img.getWidth()/2, img.getHeight()/2); 
      float radius = img.getWidth() / 2;
      float[] dist = {0.0f, 1.0f};
      Color centerColor = new Color(100, 100, 50);
      Color outerColor = new Color(25, 25, 0);
      Color[] colors = {centerColor , outerColor };
      RadialGradientPaint paint = new RadialGradientPaint(center, radius, dist, colors);
      Graphics2D g2 = img.createGraphics();
      g2.setPaint(paint);
      g2.fillRect(0, 0, img.getWidth(), img.getHeight());
      g2.dispose();

      return img;
   }

   private static void createAndShowGui() {
      FrameEg mainPanel = new FrameEg();

      JFrame frame = new JFrame("FrameEg");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(mainPanel);
      frame.setResizable(false);
      frame.pack();
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }

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

@SuppressWarnings("serial")
class MyPanel extends JPanel {
   private Dimension prefSize;
   private BufferedImage backgroundImg;

   public MyPanel(Dimension prefSize) {
      this.prefSize = prefSize;
   }

   public void setBackgroundImg(BufferedImage background) {
      this.backgroundImg = background;
   }

   @Override
   protected void paintComponent(Graphics g) {
      super.paintComponent(g);
      if (backgroundImg != null) {
         g.drawImage(backgroundImg, 0, 0, this);
      }
   }

   @Override
   public Dimension getPreferredSize() {
      return prefSize;
   }
}

@SuppressWarnings("serial")
class MyBorder extends AbstractBorder {
   private BufferedImage borderImg;
   private Insets insets;

   public MyBorder(BufferedImage borderImg, Insets insets) {
      this.borderImg = borderImg;
      this.insets = insets;
   }

   @Override
   public void paintBorder(Component c, Graphics g, int x, int y, int width,
         int height) {
      g.drawImage(borderImg, 0, 0, c);
   }

   @Override
   public Insets getBorderInsets(Component c) {
      return insets;
   }
}

看起来像：

在此处输入图像描述

于 2013-05-09T18:20:42.630 回答