This section describes java.awt.GraphicsEnvironment - Graphics Environment Class. You can use this class to to get a lot of information about your local graphics device, which is really your computer screen.
java.awt.GraphicsEnvironment is an AWT class representing graphics environment that
are accessible by the local operating system. This class also offers a static method,
getLocalGraphicsEnvironment(), to return an object representing the local default
graphics environment.
You can use this local graphics environment object to get a lot of information
about your local system. For example, you can find out what text fonts are
available, and what is maximum size of the graphical drawing area on the screen.
To show you how to use the getLocalGraphicsEnvironment() method,
I wrote the following sample program:
/**
* LocalGraphicsEnvironment.java
* Copyright (c) 2004 by Dr. Herong Yang
*/
import java.awt.*;
public class LocalGraphicsEnvironment {
public static void main(String[] a) {
GraphicsEnvironment e
= GraphicsEnvironment.getLocalGraphicsEnvironment();
String n[] = e.getAvailableFontFamilyNames();
System.out.println("Font families:");
for (int i=0; i<n.length; i++) {
System.out.println(" "+n[i]);
}
Point p = e.getCenterPoint();
System.out.println("Window center point: "+p.x+", "+p.y);
Rectangle r = e.getMaximumWindowBounds();
System.out.println("Maximum window bounds: "+r.x+", "+r.y
+", "+r.width+", "+r.height);
GraphicsDevice g = e.getDefaultScreenDevice();
System.out.println("Device ID: "+g.getIDstring());
}
}
Output:
Font families:
Albertus Extra Bold
Albertus Medium
Antique Olive
Arial
Arial Black
Arial Narrow
......
Window center point: 512, 370
Maximum window bounds: 0, 0, 1024, 740
Device ID: \Display0
Sample programs listed in this section have been tested with JDK 1.3.1, 1.4.1, 1.5.0 and 1.6.0.
