Java Program to Rotate an Image

The problem statement is to rotate an image clockwise 90 degrees for which here we will be using some in-built methods of BufferedImage class and Color c

Classes required to perform the operation is as follows:

• To read and write an image file we have to import the File class. This class represents file and directory path names in general.
• To handle errors we use the IOException class.
• To hold the image we create the BufferedImage object for that we use BufferedImage class. This object is used to store an image in RAM.
• To perform the image read-write operation we will import the ImageIO class. This class has static methods to read and write an image.
• This Graphics2D class extends the Graphics class to provide more sophisticated control over geometry, coordinate transformations, color management, and text layout. This is the fundamental class for rendering 2-dimensional shapes, text, and images on the Java(tm) platform.

Example:

Java

// Java program to rotate image by 90 degrees clockwise

// Importing classes from java.awt package for
// painting graphics and images
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
// Importing input output classes
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

// Main class
public class GFG {

    // Method 1
    // To return rotated image
    public static BufferedImage rotate(BufferedImage img)
    {

        // Getting Dimensions of image
        int width = img.getWidth();
        int height = img.getHeight();

        // Creating a new buffered image
        BufferedImage newImage = new BufferedImage(
            img.getWidth(), img.getHeight(), img.getType());

        // creating Graphics in buffered image
        Graphics2D g2 = newImage.createGraphics();

        // Rotating image by degrees using toradians()
        // method
        // and setting new dimension t it
        g2.rotate(Math.toRadians(90), width / 2,
                  height / 2);
        g2.drawImage(img, null, 0, 0);

        // Return rotated buffer image
        return newImage;
    }

    // Method 2
    // Main driver method
    public static void main(String[] args)
    {
        // try block to check for exceptions
        try {

            // Reading original image
            BufferedImage originalImg = ImageIO.read(
                new File("D:/test/Image.jpeg"));

            // Getting and Printing dimensions of original
            // image
            System.out.println("Original Image Dimension: "
                               + originalImg.getWidth() + "x"
                               + originalImg.getHeight());

            // Creating a subimage of given dimensions
            BufferedImage SubImg = rotate(originalImg);

            // Printing Dimensions of new image created
            // (Rotated image)
            System.out.println("Cropped Image Dimension: "
                               + SubImg.getWidth() + "x"
                               + SubImg.getHeight());

            // Creating new file for rotated image
            File outputfile
                = new File("D:/test/ImageRotated.jpeg");

            // Writing image in new file created
            ImageIO.write(SubImg, "jpg", outputfile);

            // Printing executed message
            System.out.println(
                "Image rotated successfully: "
                + outputfile.getPath());
        }

        // Catch block to handle the exception
        catch (IOException e) {

            // Print the line number where exception
            // occurred
            e.printStackTrace();
        }
    }
}

Output: After executing the program console will show dimensions and executed message and a new rotated image will be created at the path entered as shown: