了解"ImageIO.read(getClass().getResource(path))"； [英] Understanding "ImageIO.read(getClass().getResource(path))"

问题描述

我的问题是关于以下代码示例的:

My question is about the following code-example:

    public class BufferedImageLoader {

        private BufferedImage image;

        public BufferedImage loadImage(String path) throws IOException {

            image = ImageIO.read(getClass().getResource(path));
            return image;

        }

    }

我查看了Java-API，并在ImageIO类中找到了3种不同的read()方法:

I looked in the Java-API and found 3 different read() methods in the ImageIO Class:

1 .: 读取(文件输入)

1.: read(File input)

2 .:读取(ImageInputStream流)

2.: read(ImageInputStream stream)

3 .:读取(InputStream输入)

3.: read(InputStream input)

4 .:读取(URL输入)

4.: read(URL input)

我的问题是:在此示例中使用了哪种方法中的四种? 我有点困惑，因为在示例中立场

My question is: Which of them four methods is used in this example? I'm a little bit confused, because in the example stands

read(getClass().getResource(path));

"getClass()"在这里返回"BufferedImageLoader"，对吗? 然后我们将方法称为"read(getClass().getResource(path))"，该方法必须位于BufferedImageLoader类中，但事实并非如此！

"getClass()" returns here "BufferedImageLoader", right? Then we call the method "read(getClass().getResource(path))", which must stand in the BufferedImageLoader Class, but this is not the case!

我错了吗?

推荐答案

getClass().getResource(path))返回URL，因此在这种情况下，它将使用ImageIO.read(URL)

getClass().getResource(path)) returns a URL, so in this case, it would using ImageIO.read(URL)

此外，如果您使用Class#getResourceAsInputStream，它将返回一个InputStream，这意味着它将使用ImageIO.read(InputStream)代替

In addition, if you used Class#getResourceAsInputStream, it would return an InputStream, meaning it would be using ImageIO.read(InputStream) instead

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