Swing/TexturePaint のバックアップの現在との差分(No.17)

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BufferedImage bi = null;
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try {
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  bi = ImageIO.read(getClass().getResource("16x16.png"));
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}catch(IOException ioe) {
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  ioe.printStackTrace();
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}
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String path = "example/16x16.png";
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ClassLoader cl = Thread.currentThread().getContextClassLoader();
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BufferedImage bi = Optional.ofNullable(cl.getResource(path)).map(url -> {
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  try (InputStream s = url.openStream()) {
    return ImageIO.read(s);
  } catch (IOException ex) {
    ex.printStackTrace();
    return makeMissingImage();
  }
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}).orElseGet(MainPanel::makeMissingImage);
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texture = new TexturePaint(bi, new Rectangle(bi.getWidth(), bi.getHeight()));
panel = new JPanel() {
  @Override public void paintComponent(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
  @Override protected void paintComponent(Graphics g) {
    Graphics2D g2 = (Graphics2D) g.create();
    g2.setPaint(texture);
    g2.fillRect(0, 0, getWidth(), getHeight());
    g2.dispose();
    super.paintComponent(g);
  }
}