getProperties
public static Properties getProperties()Determines the current system properties.  
First, if there is a security manager, its checkPropertiesAccess method is called with no arguments. This may result in a security exception.  
 
The current set of system properties for use by the getProperty(String) method is returned as a Properties object. If there is no current set of system properties, a set of system properties is first created and initialized. This set of system properties always includes values for the following keys: Key Description of Associated Value  
java.version Java Runtime Environment version  
java.vendor Java Runtime Environment vendor  
java.vendor.url Java vendor URL  
java.home Java installation directory  
java.vm.specification.version Java Virtual Machine specification version  
java.vm.specification.vendor Java Virtual Machine specification vendor  
java.vm.specification.name Java Virtual Machine specification name  
java.vm.version Java Virtual Machine implementation version  
java.vm.vendor Java Virtual Machine implementation vendor  
java.vm.name Java Virtual Machine implementation name  
java.specification.version Java Runtime Environment specification version  
java.specification.vendor Java Runtime Environment specification vendor  
java.specification.name Java Runtime Environment specification name  
java.class.version Java class format version number  
java.class.path Java class path  
java.ext.dirs Path of extension directory or directories  
os.name Operating system name  
os.arch Operating system architecture  
os.version Operating system version  
file.separator File separator ("/" on UNIX)  
path.separator Path separator (":" on UNIX)  
line.separator Line separator ("\n" on UNIX)  
user.name User's account name  
user.home User's home directory  
user.dir User's current working directory  
 
 
Note that even if the security manager does not permit the getProperties operation, it may choose to permit the getProperty(String) operation.
 
Returns:
the system properties
Throws:
SecurityException - if a security manager exists and its checkPropertiesAccess method doesn't allow access to the system properties.
See Also:  
setProperties(java.util.Properties), SecurityException, SecurityManager.checkPropertiesAccess(), Properties