java - 在 Java 中为图像添加边框

Question

我正在尝试创建一个图像，通过将像素从旧位置复制到新坐标来为 Java 上的现有图像添加边框。到目前为止，这就是我所做的:

public static NewPic border (NewPic p, int borderWidth, Pixel borderColor) {
   int w = p.getWidth();
   int h = p.getHeight();

   Pixel src[][] = p.getBitmap();
   Pixel tgt[][] = new Pixel[h][w];

   for (int x = 0; x < w; x++) {
     for (int y = 0; y < h; y++) {
       tgt[y][x + y + borderWidth]  = src[x][y]; // this is probably where I a messing up
     }
  }
  return new NewPic(tgt);
  }

不确定我在评论的行中做错了什么。我是 Java 的新手。有人可以给我一些指导吗？

Answer 1

一种方法是使用基于 Swing 的边框。

import java.awt.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.border.*;

class ImageBorder {

    public static void main(String[] args) {
    Runnable r = new Runnable() {

        @Override
        public void run() {
        JPanel gui = new JPanel(new BorderLayout());
        // to contrast the 'picture frame' border created below
        gui.setBorder(new LineBorder(Color.BLUE, 12));

        Image image = // your image here..
            new BufferedImage(400,50,BufferedImage.TYPE_INT_RGB);
        JLabel l = new JLabel(new ImageIcon(image));
        Border b1 = new BevelBorder(
            BevelBorder.LOWERED, Color.LIGHT_GRAY, Color.DARK_GRAY);
        Border b2 = new LineBorder(Color.GRAY, 12);
        Border b3 = new BevelBorder(
            BevelBorder.LOWERED, Color.LIGHT_GRAY, Color.DARK_GRAY);
        Border bTemp = new CompoundBorder(b1,b2);
        Border b = new CompoundBorder(bTemp,b3);
        l.setBorder(b);

        gui.add(l);

        JOptionPane.showMessageDialog(null, gui);
        }
    };
    // Swing GUIs should be created and updated on the EDT
    // http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html
    SwingUtilities.invokeLater(r);
    }
}