Trying to display URL image in JFrame

问题

Trying to display a URL-image in a JFrame window. If this works correctly, when the program runs, a window should open displaying an image. Trying to experiment with URL's and hard-drive paths.

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.*;

 class ImageInFrame {
    public static void main(String[] args) throws IOException {
    String path = "http://chart.finance.yahoo.com/z?s=GOOG&t=6m&q=l";
    URL url = new URL(path);
    BufferedImage image = ImageIO.read(url);
    JLabel label = new JLabel(new ImageIcon(image));
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(label);
    f.pack();
    f.setLocation(200,200);
    f.setVisible(true);
  }
  }

Compiles just fine, but fails to run. I've been experimenting with some YahooFinance data simply because it's fun to work with due to it's customization. Hope someone can help. Cheers.

回答1:

Works fine for me...

Apart from the fact your not handling the exception (which might be useful for diagnostics) and not really loading the program within the EDT, it seems to work just fine...

public class TestURLImage {

    public static void main(String[] args) {
        new TestURLImage();
    }

    public TestURLImage() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                try {
                    String path = "http://chart.finance.yahoo.com/z?s=GOOG&t=6m&q=l";
                    System.out.println("Get Image from " + path);
                    URL url = new URL(path);
                    BufferedImage image = ImageIO.read(url);
                    System.out.println("Load image into frame...");
                    JLabel label = new JLabel(new ImageIcon(image));
                    JFrame f = new JFrame();
                    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    f.getContentPane().add(label);
                    f.pack();
                    f.setLocation(200, 200);
                    f.setVisible(true);
                } catch (Exception exp) {
                    exp.printStackTrace();
                }

            }
        });
    }
}

来源：https://stackoverflow.com/questions/13448368/trying-to-display-url-image-in-jframe

标签

java

url

jframe