https://www.dropbox.com/s/xpc49t8xpqt8dir/pacman%20down.jpg
画像データではなくHTMLテキストを返します。
https://www.dropbox.com/s/xpc49t8xpqt8dir/pacman%20down.jpg?dl=1
これはハックですが、代わりに試してください。ただし、ドロップ ボックスが将来このクエリを変更する可能性があることに注意してください。
public class TestURL02 {
public static void main(String[] args) {
new TestURL02();
}
public TestURL02() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new PacPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class PacPane extends JPanel {
private BufferedImage image;
public PacPane() {
InputStream is = null;
try {
URL url = new URL("https://www.dropbox.com/s/xpc49t8xpqt8dir/pacman%20down.jpg?dl=1");
// StringBuilder sb = new StringBuilder(1024);
// byte[] buffer = new byte[1024 * 1024];
// is = url.openStream();
// int in = -1;
// while ((in = is.read(buffer)) != -1) {
// sb.append(new String(buffer));
// }
// System.out.println(sb.toString());
image = ImageIO.read(url);
} catch (IOException exp) {
exp.printStackTrace();
} finally {
try {
is.close();
} catch (Exception e) {
}
}
}
@Override
public Dimension getPreferredSize() {
return image == null ? super.getPreferredSize() : new Dimension(image.getWidth(), image.getHeight());
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (image != null) {
int x = (getWidth() - image.getWidth()) / 2;
int y = (getHeight() - image.getHeight()) / 2;
g.drawImage(image, x, y, this);
}
}
}
}