Sometimes you need to create graphics, or compose images and have them saved as regular PNGs, JPEGs or GIFs.<\/p>\n
Here’s a quick and dirty reference of how to do it with BufferedImages, Graphics2D and javax.imageio.*.
\nVery straightforward.<\/p>\n
[java]
\nimport java.awt.Color;
\nimport java.awt.Graphics2D;
\nimport java.awt.image.BufferedImage;
\nimport java.io.File;
\nimport java.io.IOException;<\/p>\n
import javax.imageio.ImageIO;
\n…<\/p>\n
\/\/1. Create a BufferedImage, in this case a simple 1024×768 using only RGB colors (you could use alpha for example)
\nBufferedImage bufferedImage = new BufferedImage(1024, 768, BufferedImage.TYPE_INT_RGB);<\/p>\n
\/\/2. Get a hold of a Graphics2D object to do all the painting and compositing on the BufferedImage
\nGraphics2D graphics = bufferedImage.createGraphics();<\/p>\n
\/\/3. Do the painting… in this case, I just filled with yellow
\ngraphics.setColor(new Color(255,255,0));
\ngraphics.fillRect(0, 0, bufferedImage.getWidth(), bufferedImage.getHeight());<\/p>\n
\/\/4. Write the image
\ntry {
\n ImageIO.write(bufferedImage, "png",new File("test.png"));
\n} catch (IOException e) {
\n e.printStackTrace();
\n}
\n[\/java] <\/p>\n","protected":false},"excerpt":{"rendered":"
Sometimes you need to create graphics, or compose images and have them saved as regular PNGs, JPEGs or GIFs. Here’s a quick and dirty reference of how to do it with BufferedImages, Graphics2D and javax.imageio.*. Very straightforward. [java] import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; … \/\/1. Create a BufferedImage, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[15],"tags":[],"class_list":["post-2138","post","type-post","status-publish","format-standard","hentry","category-code"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5Unzf-yu","jetpack-related-posts":[{"id":156,"url":"https:\/\/www.gubatron.com\/blog\/portscanner-only-60-lines-of-code\/","url_meta":{"origin":2138,"position":0},"title":"PortScanner – Only 60 lines of code","author":"gubatron","date":"May 19, 2005","format":false,"excerpt":"Hi, here's a simple port scanner I wrote today in Java. I needed to see something on my server, perhaps you can find it useful. I would say its pretty fast, you can tweak the number of threads and timeouts to adjust to your server\/connection. I did't do much testing\u2026","rel":"","context":"In "Gubatron"","block_context":{"text":"Gubatron","link":"https:\/\/www.gubatron.com\/blog\/category\/gubatron\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":584,"url":"https:\/\/www.gubatron.com\/blog\/svn-gotchas-importing-a-folder-in-one-step\/","url_meta":{"origin":2138,"position":1},"title":"svn gotchas: Importing a Folder in one step","author":"gubatron","date":"September 6, 2007","format":false,"excerpt":"Up until this day when my friend Gabe told me how, I didn't know how to import a folder, without doing this first: svn mkdir svn+ssh:\/\/server.com\/path\/to\/repo\/myfolder svn import myFolder svn+ssh:\/\/server.com\/path\/to\/repo\/myfolder If I didn't do that, If I just imported the local \"myFolder\", it would end up adding all the files\u2026","rel":"","context":"In "Code"","block_context":{"text":"Code","link":"https:\/\/www.gubatron.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":980,"url":"https:\/\/www.gubatron.com\/blog\/javareflection-notes-invoking-a-static-main-method-from-a-dinamically-loaded-class\/","url_meta":{"origin":2138,"position":2},"title":"Java\/Reflection notes: Invoking a static main() method from a dinamically loaded class.","author":"gubatron","date":"November 22, 2008","format":false,"excerpt":"Maybe for some wild reason, your Java application will need to execute a pre launcher that won't know about the Main class it's supposed to invoke until it's being executed. 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