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Questions tagged [java-2d]

Java 2D is an API for drawing two-dimensional graphics using the Java programming language.

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Java2D: Increase the line width

I want to increase the Line2D width. I could not find any method to do that. Do I need to actually make a small rectangle for this purpose?
Boolean
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Setting LCD gamma / contrast (IntelliJ IDEA, JDK 8)

I am having trouble with anti-aliased text in IntelliJ IDEA. That thing for some reason ships with its own version of OpenJDK 8. Anyway... sub-pixel aliasing is acceptable with dark-on-bright text: But the gamma is wrong for bright-on-dark…
0__
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Java2D Performance Issues

I'm having performance oddities with Java2D. I know of the sun.java2d.opengl VM parameter to enable 3D acceleration for 2D, but even using that has some weird issues. Here are results of tests I ran: Drawing a 25x18 map with 32x32 pixel tiles on a…
Consty
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Java2D: Is it always safe to cast Graphics into Graphics2D

Assuming we always use a Sun JVM (say, 1.5+), is it always safe to cast a Graphics reference to Graphics2D? I haven't seen it cause any problems yet and, to my understanding, the Graphics class is legacy code but the Java designers didn't want to…
Tim Frey
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Java 2D Drawing Optimal Performance

I'm in the process of writing a Java 2D game. I'm using the built-in Java 2D drawing libraries, drawing on a Graphics2D I acquire from a BufferStrategy from a Canvas in a JFrame (which is sometimes full-screened). The BufferStrategy is…
Zarkonnen
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How to draw a directed arrow line in Java?

I want to draw a directed arrow line through Java. At present, I am using java.awt.Line2D.Double class to draw a line g2.setStroke(new BasicStroke(2.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL)); // g2 is an instance of Graphics2D g2.draw(new…
Amit
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Occasional InterruptedException when quitting a Swing application

I recently updated my computer to a more powerful one, with a quad-core hyperthreading processor (i7), thus plenty of real concurrency available. Now I'm occasionally getting the following error when quitting (System.exit(0)) an application (with a…
Joonas Pulakka
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How to draw a circle with given X and Y coordinates as the middle spot of the circle?

I have developed a telecommunication application for locating signal strengths from the towers. I have used java swing and I'm having a problem when drawing the circle around the given point of the mobile signal transmitter tower location. I have…
нαƒєєz
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Collision detection with complex shapes

I am wanting to make a game that has each level loaded from an image. I want to draw up the whole level in Photoshop, and then set it as the background and allow the player to walk over it. I want another invisible image to go over top which will be…
calebmanley
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Game design in an OO manner

I'm designing a simple game, which uses Java 2D and Newtonian physics. Currently my main "game loop" looks something like: do { for (GameEntity entity : entities) { entity.update(gameContext); } for (Drawable drawable : drawables) { …
Adamski
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How can I create a drop shadow, inner glow and outer glow in Java Swing?

I am generating some images using the Graphics2D interface, and occasionally I'd like to be able to draw some text on the image and apply to it effects like the ones in Adobe Photoshop. Right now to generate a 'shadow' on the text I am drawing the…
Tom Neyland
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Is there a 100% Java alternative to ImageIO for reading JPEG files?

We are using Java2D to resize photos uploaded to our website, but we run into an issue (a seemingly old one, cf.: http://forums.sun.com/thread.jspa?threadID=5425569) - a few particular JPEGs raise a CMMException when we try to ImageIO.read() an…
chesterbr
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How to get a good quality thumbnail

I am trying to create a high quality thumbnail of this image, with Java and Scalr 3.2 This is the relevant source code, where THUMB_WIDTH = 77 and THUMB_HEIGHT = 57 BufferedImage srcImg = ImageIO.read(new File(sourceFile)); BufferedImage dstImg =…
stivlo
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What are some faster alternatives to Java2d?

I'm looking to do some physics simulations and I need fast rendering in Java. I've run into performance issues with Java2d in the past, so what are the fast alternatives? Is JOGL significantly faster than Java2d?
KingNestor
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Smoothing a jagged path

I was participating in the thread Image/Graphic into a Shape the other day and made a hackish attempt to get the outline of an image by adding a Rectangle iteratively to an Area. That was very slow. This example instead builds a GeneralPath and…
Andrew Thompson
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