Skip to main content

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


Labels:

Comments

Post a Comment

Popular posts from this blog

NullPointerException

java.lang.NullPointerException NullPointerException is described in the javadoc comments as: Thrown when an application attempts to use null in a case where an object is required. These include: Calling the instance method of a null object. Accessing or modifying the field of a null object. Taking the length of null as if it were an array. Accessing or modifying the slots of null as if it were an array. Throwing null as if it were a Throwable value. Applications should throw instances of this class to indicate other illegal uses of the null object. author: unascribed version: 1.19, 12/19/03 since: JDK1.0 Where is this exception thrown? Following, is a list of exception messages cross-referenced to the source code responsible for throwing them. Click on the method link to view the code and see how the exception is thrown. The message ' java.lang.NullPointerException: ' is thrown within the method: com.sun.corba.se.impl.interceptors.ClientRequestInfoImpl.get_r...
Post a Comment
Read more

Connection refused: No available router to destination

This is a simple symptom-cause-solution blog entry only. I hope these blogs will help fellow administrators. Symptom The following exception occurs in WebLogic server logs. Most likely to occur during WebLogic server start-up, but similar exceptions may occur at other times. java.net.ConnectException: t3://myserver:8000: Destination unreachable; nested exception is: java.net.ConnectException: Connection refused: connect; No available router to destination] at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:49) at weblogic.jndi.WLInitialContextFactoryDelegate.toNamingException(WLInitialContextFactoryDelegate.java:773) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:363) at weblogic.jndi.Environment.getContext(Environment.java:307) at weblogic.jndi.Environment.getContext(Environment.java:277) Cause This message (Connection refused: connect; No available ...
Post a Comment
Read more

Recovering WebLogic Passwords

In one of my previous articles ( here ) I explained that the SerializedSystemIni.dat file in WebLogic contains the key used to encrypt and decrypt passwords. If you're not currently keeping this file secure I suggest you do, as with it someone can (to name a few things): Decrypt the WebLogic admin username and password from boot.properties. Recover database passwords, if JDBC Connection pools are configured, from config.xml. Recover the keystore passwords from config.xml and obtain SSL certificates stored in the jks keystores. Essentially, they can do whatever they want, so if you don't know who can read your SerializedSystemIni.dat files, look... now. In this article I will show how easy it is for this file to be used to recover lost passwords via a simple WLST script. The Script The script I use to decrypt passwords is incredibly short, and it works with WebLogic 8, 9 and 10 (probably for version 7 too). To use it, just create a new file called decryptpwd.py and paste the fol...
16 comments
Read more