试图在 JFrame 中显示 URL 图像

2022-01-24 00:00:00 url java jframe

试图在 JFrame 窗口中显示 URL 图像.如果这工作正常，当程序运行时，应该会打开一个显示图像的窗口.尝试使用 URL 和硬盘驱动器路径.

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);
  }
  }

编译得很好，但无法运行.我一直在试验一些 YahooFinance 数据，只是因为它是自定义的，所以使用起来很有趣.希望有人可以提供帮助.干杯.

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.

推荐答案

对我来说很好......

Works fine for me...

除了您没有处理异常(这可能对诊断有用)并且没有真正在 EDT 中加载程序之外，它似乎工作得很好......

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();
                }

            }
        });
    }
}

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