satya - 4/13/2014 11:02:55 AM

Here is how you get the system temp directory


public static String getSystemTempDirectory()   
{
    return System.getProperty("java.io.tmpdir");
}

satya - 6/14/2017, 7:20:36 PM

Java System class API

Search for: Java System class API

satya - 6/14/2017, 7:25:08 PM

API for java.lang.System

satya - 6/14/2017, 7:25:25 PM

Well known Java System Properties

Search for: Well known Java System Properties

satya - 6/14/2017, 7:27:06 PM

OK. These are documented under System.getProperties() method

satya - 6/14/2017, 7:28:53 PM

Here is the same link for Java 8

satya - 6/14/2017, 7:34:43 PM

Here are those constants


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.library.path    List of paths to search when loading libraries
java.io.tmpdir       Default temp file path
java.compiler        Name of JIT compiler to use

java.ext.dirs        Path of extension directory or directories Deprecated. 
This property, and the mechanism which implements it, 
may be removed in a future release.

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