Drawing in the Java 2D API in Java Create PDF-417 2d barcode in Java Drawing in the Java 2D API

How to generate, print barcode using .NET, Java sdk library control with example project source code free download:
6.8 Drawing in the Java 2D API using tomcat toaccess pdf 417 in web,windows application GS1 Standards Knowledge Centre AffineTransfo pdf417 for Java rm at = AffineTransform.getTranslateInstance (72, 0); g2.transform (at); // Create a rotation transform of 30 degrees CCW around // the top left corner of the rectangle.

AffineTransform atx = AffineTransform.getRotateInstance ( Math.PI/6, 30, 20); // Take the shape object and create a rotated version Shape atShape = atx.

createTransformedShape (shape1); g2.draw (atShape); // Another 72 unit shift. g2.

transform (at); // Create a scaling transform atx = AffineTransform.getScaleInstance (1.5, 1.

5); // Take the shape object and create a scaled version atShape = atx.createTransformedShape (shape1); g2.draw (atShape); // Another 72 unit shift.

g2.transform (at); // Create a shear transform atx = AffineTransform.getShearInstance (0.

0, 0.5); // Take the shape object and create a sheared version atShape = atx.createTransformedShape (shape1); g2.

draw (atShape); // Another 72 unit shift. g2.transform (at); // Illustrate compound transforms // First get a transform object atx = new AffineTransform (); // Then set to a shear transform atx.

setToShear (0.0, 0.5); // and then rotate about the current origin atx.

rotate (-Math.PI/5, 40, 50); // Now apply to the rectangle atShape = atx.createTransformedShape (shape1); g2.

draw (atShape);. } // paintComponent } // class TransformPanel Java graphics In the rst f our transforms, we used static methods in the AffineTransform class to obtain instances of the class for the particular type of transform desired. For example, a translation transform is obtained with. AffineTransfo spring framework pdf417 2d barcode rm at = AffineTransform.getTranslateInstance (72, 0);. Applying this to the graphics context moves its origin horizontally by 72 units:. g2.transform (at);. All subsequen t coordinate values are relative to that new position on the drawing surface. Here the translation lets us draw the rectangle at a different position without changing its internal coordinate values. Then the rectangle is operated on with a rotation transform obtained with the getRotateInstance() static method:.

AffineTransfo PDF-417 2d barcode for Java rm atx = AffineTransform.getRotateInstance ( Math.PI/6, 40, 50);.

Then a new re ctangle in the rotated orientation is obtained with the createTransformedShape() method as follows:. Shape atShape j2ee PDF 417 = atx.createTransformedShape (shape1);. Finally, the new rotated rectangle is drawn with:. g2.draw (atShape);. This same pro cess is repeated for scaling and shear transforms. Finally, a combined transform is created by creating an instance of AffineTransform and then its setToShear() and rotate() methods are applied to the original rectangle to obtain a new transformed one..

6.9 Images We introduce the basics of image handling here so you can begin to use them in your programs. We return to images again in 11 with a much more detailed discussion. The base class for images is java.

awt.Image. With Java 1.

2 came the more capable subclass java.awt.image.

BufferedImage. It works with the image processing tools of the Java 2D API and so we wait to discuss BufferedImage in 11. As of Java 1.

4 you can load and draw image les encoded as JPEG, GIF, and PNG. With Java 5.0 you can also load bitmap formats BMP and WBMP.

To load an image into an applet, you can use one of the overloaded getImage() methods in the Applet class for locating the le with a URL, as in. Image img = g applet PDF417 etImage ("

gif");. 6.9 Images Image img = g applet pdf417 etImage (getCodeBase (), "anImage.gif");. In the latter case the Applet class method getCodeBase() provides the web address for the location of the applet s class le. The le name in the second parameter is then appended to the codebase and this combined address is used to locate the image le. To load an image from within an application, as opposed to an applet, you can use.

Image img = T barcode pdf417 for Java oolkit.getDefaultToolkit ().getImage (URL or filename);.

Here the meth od parameter is either a or a String containing the lename of the image le.

The Toolkit is a class in the java.awt package that provides various resources and tools for the graphics system. One of the Toolkit methods is getImage(), which functions much like the Applet.

getImage() method. It is overloaded to take either a String filename parameter specifying the location of the image le or a URL parameter identifying the image le. (See 13 for information about the java.

net.URL class.) Before calling getImage(), one must have a reference to the Toolkit instance in use.

The static method Toolkit.getDefaultToolkit() returns a reference to that Toolkit. You can obtain an image from a JAR le by using the static getResource() method from the Class class.

This takes advantage of the class loader in the JVM that reads in a class and loads it for running. The class loader knows how to load les so it can also be used for loading image les and other resources. For example, if you were running an application named YourApp, you could obtain an image as follows:.

URL url = You applet barcode pdf417 rApp.class.getResource ("myPhoto.

gif"); Image img = Toolkit.getDefaultToolkit ().getImage (url);.

Or you could just use this.getClass() to get the Class of the current object:. URL url = thi pdf417 2d barcode for Java s.getClass ().getResource ("myPhoto.

gif"); Image img = Toolkit.getDefaultToolkit ().getImage (url);.

You can then draw the image with this method in the Graphics class:. void drawImag j2ee barcode pdf417 e (Image img, int x, int y, ImageObserver io);. As we discuss further in 11, the getImage() method returns immediately. The actual loading of the image does not begin until the program attempts to draw the image or to obtain the dimensions of the image with the getWidth()and getHeight() methods. This approach was designed to avoid slowing a program while waiting for images to arrive over slow network links.

Copyright © . All rights reserved.