Read an Image from File or URL or Class Path

In the following tutorial we demonstrate how to read an image from a File, URL, class-path or InputStream.

How to Read an Image in Java

This example shows how to read an image in java.

• File – specifies a local folder on your computer/server.
• URL – specifies a resource from the internet.
• class-path – specifies a class path resource located in src/main/resources.
• InputStream – specifies a InputStream.

package com.memorynotfound.image;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

public class ReadImageExample {

    public static void main(String... args) throws IOException {

        // read image from folder
        File folderInput = new File("/tmp/duke.png");
        BufferedImage folderImage = ImageIO.read(folderInput);

        // read image from url
        URL urlInput = new URL("https://memorynotfound.com/wp-content/uploads/java-duke.png");
        BufferedImage urlImage = ImageIO.read(urlInput);

        // read image from class-path
        File classPathInput = new File(ReadImageExample.class.getResource("duke.png").getFile());
        BufferedImage classpathImage = ImageIO.read(classPathInput);

        // read image from inputstream
        InputStream isInput = new FileInputStream("/tmp/duke.png");
        BufferedImage inputStreamImage = ImageIO.read(isInput);

    }

}

References

• ImageIO JavaDoc
• BufferedImage JavaDoc
• URL JavaDoc
• InputStream JavaDoc