Monday, February 7, 2011

Java System Properties

This is a quick post with some useful code for printing a complete list of Java system properties. System properties give you access to certain JVM startup parameters and system information.

The following code (SysProp.java) can be used to print all system properties.

import java.util.Properties;
import java.util.Enumeration;

public class SysProp {

public static void main(String[] args) {
Properties sysprops = System .getProperties();
Enumeration e = sysprops.propertyNames();
while (e.hasMoreElements()) {
String key = (String)e.nextElement();
String value = sysprops.getProperty(key);
System.out.println(key + "=" + value);
}
}

}

The resulting output should look like this:

java.vm.vendor.url.bug=http://edocs.bea.com/jrockit/go2troubleshooting.html
java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition
sun.boot.library.path=E:\APPS\bea_x64\jrockit-R27.5.0-jdk1.5.0_14\jre\bin
java.vm.version=R27.5.0-110_o-99226-1.5.0_14-20080528-1505-windows-x86_64
java.vm.vendor=BEA Systems, Inc.
java.vendor.url=http://www.bea.com/
path.separator=;
java.vm.name=BEA JRockit(R)
file.encoding.pkg=sun.io
user.country=US
sun.java.launcher=SUN_STANDARD
sun.os.patch.level=Service Pack 2
java.vm.vendor.url=http://www.bea.com/
java.vm.specification.name=Java Virtual Machine Specification
user.dir=C:\
java.runtime.version=1.5.0_14-b03
java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs=...\bea_x64\jrockit-R27.5.0-jdk1.5.0_14\jre\lib\endorsed
os.arch=amd64
java.io.tmpdir=C:\Users\*****\AppData\Local\Temp\2\
line.separator=

java.vm.specification.vendor=Sun Microsystems Inc.
user.variant=
os.name=Windows Vista
sun.jnu.encoding=Cp1252
java.library.path=...
java.specification.name=Java Platform API Specification
java.class.version=49.0
sun.management.compiler=BEA JRockit(R) Optimizing Compiler
os.version=6.0
user.home=C:\Users\******
user.timezone=
java.awt.printerjob=sun.awt.windows.WPrinterJob
file.encoding=Cp1252
java.specification.version=1.5
user.name=*****
java.class.path=.
java.vm.specification.version=1.0
sun.arch.data.model=64
java.home=E:\APPS\bea_x64\jrockit-R27.5.0-jdk1.5.0_14\jre
java.specification.vendor=Sun Microsystems Inc.
user.language=en
awt.toolkit=sun.awt.windows.WToolkit
java.vm.info=compiled mode
java.version=1.5.0_14
java.ext.dirs=...
java.vendor=BEA Systems, Inc.
file.separator=\
java.vendor.url.bug=http://edocs.bea.com/jrockit/go2troubleshooting.html
sun.cpu.endian=little
sun.io.unicode.encoding=UnicodeLittle
sun.desktop=windows
sun.cpu.isalist=amd64


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