graphics2d

I would like to rotate a rectangle around its center point and it should remain in the place that it is supposed be drawn and rotate in that space this is my code: AffineTransform transform = new AffineTransform(); transform.rotate(Math.toRadians(45),rectangle.width/2, rectangle.height/2); Shape transformed = transform.createTransformedShape(rectangle); g2.fill(transformed) the rectangle is rotated but it is drawn at a different part of the screen, how can I correct this? I haven't tried this, but it seems you aren't getting the correct middle of the rectangle. Try: AffineTransform transform =

Thanks ahead of time for the help Description: The program draws, displays, and saves an image. It works as following: the object itself extends Frame. In the constructor, the object creates a BufferedImage, and calls a method that draw onto that image. Then, it displays the image onto the Frame. Finally, it saves the image into a file (I don't care what format it uses). The main program creates the object, which does the rest. Problem: The saved file always has a colored background! This is especially wierd since the displayed image is fine. If I use "jpg" format with ImageIO.write(), the

I'm using Java's Graphics2D to generate a graphical representation of a graph. I'm also using ImageIO to write a PNG file. ( ImageIO.write(image, "png", out); ) I'm wondering how should I write JUnit tests to test whether the generated graphics is what is expected. I could pre-generate the PNG files but what if the font is a bit different on a different machine? You could try testing for specific, known features of the output e.g.: It there a white pixel at (100,100)? It the border completely black? Is the image the expected size? And/or you could write tests for some "aggregate properties"

Once again I'm doing Java graphics (Graphics2D) but I noticed there is no Polygon.Double or Polygon.Float classes whereas there is Rectangle2D.Float and Rectangle2D.Double class. Does anyone know why this is? I just need to draw a triangle using doubles as points. You can use a Path2D (or a Path2D.Float or Path2D.Double ) to get the same effect. 来源： https://stackoverflow.com/questions/2377551/wheres-polygon-double-in-java

I want to rotate text on a JPanel using Graphics2D.. My code is this: double paso=d.width/numeroBarras; double alto=datos[i].valor; Font fBarras=new Font("Serif", Font.PLAIN, 15); g2.setFont(fBarras); Rectangle2D barra=new Rectangle2D.Double(x,d.height-alto,paso,alto); //g2.fill(barra); x+=paso; g2.draw(barra); g2.rotate(-Math.PI/2); g2.setColor(Color.BLACK); g2.drawString(datos[i].titulo,(float)alto,(float)paso) This method must draw a rectangle and a text over the rectangle, but when i run this method all the graphic is rotated and i just want rotate the text .. Thanks :) The method

I have an image inside the JApplet and I want it to appear in a random position. It will disappear after 1 second and appear again, in another random position. How do I implement 'blinking in a random position'? import javax.imageio.ImageIO; import javax.swing.*; import java.awt.*; import java.net.URL; public class Random extends JApplet { Image ball; public void init() { try { URL pic = new URL(getDocumentBase(), "ball.gif"); ball = ImageIO.read(pic); } catch (Exception e) { e.printStackTrace(); } } public void paint(Graphics g) { if (ball != null) { g.drawImage(ball,50,50,50,50,this); } } }

I'm writing a program which should allow the user to create a floor plan of a room - this means they can draw lines to represent walls etc. I am using a JPanel with Graphics 2D to do all the drawing stuff and currently I have a grid set as the background for the JPanel and I can draw lines based on the mouse movement(I have an enum for the mousestate with two states - DRAGGING and IDLE). However I want to add control points to the lines so that they can be moved around the JPanel once they are drawn and I can't figure out how to this. I know that I need rectangles to represent the points but I

I am trying to extract all datas( such as square ,rect,line etc.,) from a pdf document which was generated using iText.But I'm not able extract the content rather than text and image.I want to extract graphical components mentioned above. npinti There seem to be 3 options for this (at least those are the ones I could find), I do not know what you exactly have, so I will paste all the 3, these are in increasing levels of difficulty) First Option: You could do something like so: (taken from here) PDDocument document = null; document = PDDocument.load(inFile); List pages = document