Java tutorial
import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Rectangle; import java.awt.Shape; import java.awt.TexturePaint; import java.awt.image.BufferedImage; import java.net.URL; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.SwingUtilities; public class Main { public static BufferedImage getStrokedImage(BufferedImage bi, Shape shape, int strokeWidth) { int w = bi.getWidth(); int h = bi.getHeight(); BufferedImage bib = new BufferedImage(w, h, bi.getType()); Graphics2D g = bib.createGraphics(); BasicStroke bs = new BasicStroke(strokeWidth); g.setStroke(bs); Rectangle rect = new Rectangle(0, 0, w, h); TexturePaint tp = new TexturePaint(bi, rect); g.setPaint(tp); g.draw(shape); g.dispose(); return bib; } public static void main(String[] args) throws Exception { URL url = new URL("http://www.java2s.com/style/download.png"); final BufferedImage bi = ImageIO.read(url); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { int strokeWidth = 12; int pad = 50; Shape shape = new Rectangle(pad, pad, bi.getWidth() - (2 * pad), bi.getHeight() - (2 * pad)); Image i = getStrokedImage(bi, shape, strokeWidth); JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(i))); } }); } }