Java Swing: unable to load image using getResource

问题

I'm trying to isolate where the problem could be when trying to add an image to the class directory. (Doing this so when I export as a runnable JAR, the image is included in the package).

So I've got the strawberry.jpg file sitting in 'C:\Users\sean\workspace\myApps\src\testing' Could you advise what I'm missing? Thanks!

package testing;

import java.awt.*;
import javax.swing.*;

public class IconTest {

    public static void main(String[] arguments) {

        JFrame frame1 = new JFrame();
        frame1.setTitle("Frame1");
        frame1.setSize(500, 500);
        frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        FlowLayout flo = new FlowLayout();
        frame1.setLayout(flo);

        JLabel label1 = new JLabel(new ImageIcon(
            IconTest.class.getResource("strawberry.jpg")));
        frame1.add(label1);
        frame1.setVisible(true);
    }
}

回答1:

I would use SomeClass.class.getResourceAsStream("...") as in the following example:

public static void main(String[] arguments) throws IOException {

    JFrame frame1 = new JFrame();
    frame1.setTitle("Frame1");
    frame1.setSize(500, 500);
    frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    FlowLayout flo = new FlowLayout();
    frame1.setLayout(flo);

    InputStream resourceAsStream = IconTest.class.getResourceAsStream("strawberry.jpg");
    Image image = ImageIO.read(resourceAsStream);

    JLabel label1 = new JLabel(new ImageIcon(image));
    frame1.add(label1);
    frame1.setVisible(true);
}

回答2:

Put the image file in the directory where your compiled classes are located and change the path in yor code by adding "/" before the filename:

JLabel label1 = new JLabel(new ImageIcon(
        IconTest.class.getResource("/strawberry.jpg")));

Resources are searched for in the class path.

来源：https://stackoverflow.com/questions/22733881/java-swing-unable-to-load-image-using-getresource

标签

java

swing

jlabel

embedded-resource

getresource