Graphics Object : Java Glossary

by Roedy Green ©1996-2008 Canadian Mind Products
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Graphics Object

The Graphics class is abstract. It is just a collection of specifications for low-level drawing methods. The graphics object also contains a reference to the area of ram where the bit image will be constructed and it also contains the current clipping region. It is used for all types of painting including placing components, canvas drawing, and laying out text.

The most often use the Graphics object is as a parameter to your paint, paintComponent or print method. You often cast the abstract Graphics to an actual Graphics2D object to access additional methods. Have a look at the Screws application to understand the basics of drawing.

Sun’s Javadoc on the Graphics class : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the Graphics2D class : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the GeneralPath class : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the Path2D class : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Path2D is available in JDK 1.6+.

Sun’s Javadoc on Graphics2D.addRenderingHints : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the clearRect method : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the drawImage method : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the drawPolygon method : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the drawString method : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

the Graphics. drawString method behaves differently from other drawing methods. Usually the x,y is the upper left corner. For drawString, it is the left end of the string baseline.

Sun’s Javadoc on the fillRect method : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on the setClip method : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Sun’s Javadoc on Graphics2D.setTransform : available:

on the web at java.sun.com
in the current JDK 1.6.0_07 or in the old JDK 1.5.0_16 or in the beta JDK 1.6.0_10 on your local J: drive.

Canvas
co-ordinates
Image

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