Java JPanel 平铺背景图像

Question

我目前有创建 JOptionPane 的代码，无论我将其设置为多大尺寸，它都会将图像平铺到背景 :)

package test;
import java.awt.*;  
import java.awt.image.BufferedImage;  
import java.io.*;  
import javax.imageio.ImageIO;  
import javax.swing.*;  

public class TiledImage extends JPanel {  
    BufferedImage tileImage;  


    public TiledImage(BufferedImage image) {  
        tileImage = image;  
    }  

    protected void paintComponent(Graphics g) {  
        int width = getWidth();  
        int height = getHeight();  
        for (int x = 0; x < width; x += tileImage.getWidth()) {  
            for (int y = 0; y < height; y += tileImage.getHeight()) {  
                g.drawImage(tileImage, x, y, this);  
            }  
        }  
    }  

    public Dimension getPreferredSize() {  
        return new Dimension(240, 240);  
    }  

    public static void main(String[] args) throws IOException {  
        BufferedImage image = ImageIO.read(new File("./resource/patterngrey.png"));  
        TiledImage test = new TiledImage(image);  
        JOptionPane.showMessageDialog(null, test, "", JOptionPane.PLAIN_MESSAGE);  
    }  
} 

我遇到的问题是使用相同的代码将图像添加到 JFrame 中的 JPanel 背景这是我所拥有的:

package test;
import java.awt.*;  
import java.awt.image.BufferedImage;  
import java.io.*;  
import javax.imageio.ImageIO;  
import javax.swing.*;  

public class TiledImage extends JPanel {  
    BufferedImage tileImage;  
    static JFrame mainFrame = new JFrame("Program Name");
    static JPanel userDetailsPanel = new JPanel();

    public TiledImage(BufferedImage image) {  
        tileImage = image;  
    }  

    protected void paintComponent(Graphics g) {  
        int width = getWidth();  
        int height = getHeight();  
        for (int x = 0; x < width; x += tileImage.getWidth()) {  
            for (int y = 0; y < height; y += tileImage.getHeight()) {  
                g.drawImage(tileImage, x, y, this);  
            }  
        }  
    }  


    public static void main(String[] args) throws IOException {  
        mainFrame.setSize(400,400);
        mainFrame.setLayout(new BorderLayout());
        mainFrame.add(userDetailsPanel, BorderLayout.CENTER);
        BufferedImage image = ImageIO.read(new File("./resource/patterngrey.png"));  
        TiledImage backgroundImage = new TiledImage(image);  
   //   userDetailsPanel.setComponent(backgroundImage); //i know this line is wrong 
   //but i dont know how to correct it
        mainFrame.setVisible(true);
    }  
} 

如果有更好的方法来做到这一点，那么我们将不胜感激任何和所有的帮助，这种方法会减少很多代码，这也很棒。对背景进行排序后，我确实需要在背景顶部添加标签和按钮。

背景需要平铺，因为应用程序在 JFrame 中有几个不同的 JPanel，具有不同的图案背景，我想让框架可调整大小

Answer 1

java.awt.TexturePaint 的实例提供了一种方便的方法来平铺 BufferedImage。相关例子可见here .给定一个 TexturePaint，您可以很容易地填充组件的背景，如图所示 here .

    private TexturePaint paint;

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g;
        g2d.setPaint(paint);
        g2d.fillRect(0, 0, getWidth(), getHeight());
    }