|
What's an easy way to access System Property information?
Author: Deron Eriksson
Description: This Java tutorial describes how to use SystemUtils from Commons Lang to conveniently access System Property information.
Tutorial created using:
Windows XP || JDK 1.5.0_09 || Eclipse Web Tools Platform 2.0 (Eclipse 3.3.0)
(Continued from page 1) Let's look at all the public fields in SystemUtils and their values. To do this, I wrote the SystemUtilsTest class. SystemUtilsTest.javapackage test; import java.lang.reflect.Field; import org.apache.commons.lang.SystemUtils; public class SystemUtilsTest { public static void main(String args[]) throws Exception { Class<SystemUtils> c = SystemUtils.class; Field[] fields = c.getFields(); for (int i = 0; i < fields.length; i++) { Field f = fields[i]; System.out.printf("%-40s :" + f.get(c) + "\n", c.getSimpleName() + "." + f.getName()); } } } The output of SystemUtilsTest is shown here. ResultsSystemUtils.AWT_TOOLKIT :sun.awt.windows.WToolkit SystemUtils.FILE_ENCODING :Cp1252 SystemUtils.FILE_SEPARATOR :\ SystemUtils.JAVA_AWT_FONTS :null SystemUtils.JAVA_AWT_GRAPHICSENV :sun.awt.Win32GraphicsEnvironment SystemUtils.JAVA_AWT_HEADLESS :null SystemUtils.JAVA_AWT_PRINTERJOB :sun.awt.windows.WPrinterJob SystemUtils.JAVA_CLASS_PATH :C:\projects\workspace\testing\bin;C:\projects\workspace\testing\lib\commons-io-1.4.jar;C:\projects\workspace\testing\lib\commons-lang-2.3.jar SystemUtils.JAVA_CLASS_VERSION :49.0 SystemUtils.JAVA_COMPILER :null SystemUtils.JAVA_ENDORSED_DIRS :C:\Program Files\Java\jre1.5.0_09\lib\endorsed SystemUtils.JAVA_EXT_DIRS :C:\Program Files\Java\jre1.5.0_09\lib\ext SystemUtils.JAVA_HOME :C:\Program Files\Java\jre1.5.0_09 SystemUtils.JAVA_IO_TMPDIR :C:\DOCUME~1\Deron\LOCALS~1\Temp\ SystemUtils.JAVA_LIBRARY_PATH :C:\Program Files\Java\jre1.5.0_09\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\jdk1.5.0_09\bin\..\jre\bin\client;C:\jdk1.5.0_09\bin\..\jre\bin;C:\jdk1.5.0_09\bin;C:\maven-2.0.8\bin;C:\Program Files\Mail Enable\BIN;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\jadnt158;C:\mysql-essential-5.0.27\bin;C:\Program Files\QuickTime\QTSystem\;C:\putty;C:\CVSNT\ SystemUtils.JAVA_RUNTIME_NAME :Java(TM) 2 Runtime Environment, Standard Edition SystemUtils.JAVA_RUNTIME_VERSION :1.5.0_09-b03 SystemUtils.JAVA_SPECIFICATION_NAME :Java Platform API Specification SystemUtils.JAVA_SPECIFICATION_VENDOR :Sun Microsystems Inc. SystemUtils.JAVA_SPECIFICATION_VERSION :1.5 SystemUtils.JAVA_UTIL_PREFS_PREFERENCES_FACTORY :null SystemUtils.JAVA_VENDOR :Sun Microsystems Inc. SystemUtils.JAVA_VENDOR_URL :http://java.sun.com/ SystemUtils.JAVA_VERSION :1.5.0_09 SystemUtils.JAVA_VM_INFO :mixed mode SystemUtils.JAVA_VM_NAME :Java HotSpot(TM) Client VM SystemUtils.JAVA_VM_SPECIFICATION_NAME :Java Virtual Machine Specification SystemUtils.JAVA_VM_SPECIFICATION_VENDOR :Sun Microsystems Inc. SystemUtils.JAVA_VM_SPECIFICATION_VERSION :1.0 SystemUtils.JAVA_VM_VENDOR :Sun Microsystems Inc. SystemUtils.JAVA_VM_VERSION :1.5.0_09-b03 SystemUtils.LINE_SEPARATOR : SystemUtils.OS_ARCH :x86 SystemUtils.OS_NAME :Windows XP SystemUtils.OS_VERSION :5.1 SystemUtils.PATH_SEPARATOR :; SystemUtils.USER_COUNTRY :US SystemUtils.USER_DIR :C:\projects\workspace\testing SystemUtils.USER_HOME :C:\Documents and Settings\Deron SystemUtils.USER_LANGUAGE :en SystemUtils.USER_NAME :Deron SystemUtils.USER_TIMEZONE : SystemUtils.JAVA_VERSION_TRIMMED :1.5.0_09 SystemUtils.JAVA_VERSION_FLOAT :1.5 SystemUtils.JAVA_VERSION_INT :150 SystemUtils.IS_JAVA_1_1 :false SystemUtils.IS_JAVA_1_2 :false SystemUtils.IS_JAVA_1_3 :false SystemUtils.IS_JAVA_1_4 :false SystemUtils.IS_JAVA_1_5 :true SystemUtils.IS_JAVA_1_6 :false SystemUtils.IS_OS_AIX :false SystemUtils.IS_OS_HP_UX :false SystemUtils.IS_OS_IRIX :false SystemUtils.IS_OS_LINUX :false SystemUtils.IS_OS_MAC :false SystemUtils.IS_OS_MAC_OSX :false SystemUtils.IS_OS_OS2 :false SystemUtils.IS_OS_SOLARIS :false SystemUtils.IS_OS_SUN_OS :false SystemUtils.IS_OS_UNIX :false SystemUtils.IS_OS_WINDOWS :true SystemUtils.IS_OS_WINDOWS_2000 :false SystemUtils.IS_OS_WINDOWS_95 :false SystemUtils.IS_OS_WINDOWS_98 :false SystemUtils.IS_OS_WINDOWS_ME :false SystemUtils.IS_OS_WINDOWS_NT :false SystemUtils.IS_OS_WINDOWS_XP :true Among other things, from the results, you can see that I'm using JavaSW 1.5 and Windows XP. Related Tutorials:
|