How can I load/Read images in JAVA

I'm trying to load image in Java but I'm facing this error:

javax.imageio.IIOException: Can't read input file!
	at java.desktop/javax.imageio.ImageIO.read(ImageIO.java:1308)
	at Main.main(Main.java:10)

This is my code:

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class Main {
    private static BufferedImage tmp;
    public static void main(String[] args) {
        try {
             tmp = ImageIO.read(new File("defaults.png"));
            System.out.println("reading completed ");
        }catch (IOException e){
            System.out.println("Error loading image ");
            e.printStackTrace();
        }
    }
}

This specific error message is thrown when, well, the file can't be read. Check the source code of ImageIO.read():

> if (!input.canRead()) {
> throw new IIOException("Can't read input file!");
> }

It uses the File.canRead() method to check if the file can be read. The documentation from that method say:

> Returns:
>
> true if and only if the file specified by this abstract pathname exists and can be read by the application; false otherwise

So the file you are trying to load must exists and the permission must be correct. When the exists() method returns false for your File object you know that the file you are trying to load does not exists (in the working directory you are in). When the file does indeed exists, it is a permission issue that your application are not allowed to read the file.

In a case like this, I would suggest:

• Log out the absolute path of the file, to check that the system is looking for it where you think it is looking for it

• Try to read the file with one of the newer file API calls (available via the Files class) which will tend to give more clueful errors us to why the file cannot be read:

    File f = new File("defaults.png");
    System.out.println(f.getAbsolutePath());
  
    try {
        Path p = f.toPath();
        Files.readAllBytes(p);
    } catch (IOException ioex) {
        ioex.printStackTrace();
    }