JVM 有哪些系统属性?

用以下代码片段可以打印出所有的系统属性:

import java.util.Enumeration;
import java.util.Properties;
public class HelloWorld001 {
    public static void main(String[] args) {
        Properties ps = System.getProperties();
        for (@SuppressWarnings("unchecked")
        Enumeration<String> e = (Enumeration<String>) ps.propertyNames(); e
                .hasMoreElements();) {
            String key = e.nextElement();
            System.out.println(key + " = " + ps.getProperty(key));
        }
    }
}

在我的一些设备上运行的输出结果如下:

1. Windows XP Home of DELL 1501

java.runtime.name = Java(TM) SE Runtime Environment
sun.boot.library.path = C:\Program Files\Java\jre7\bin
java.vm.version = 21.1-b02
java.vm.vendor = Oracle Corporation
java.vendor.url = http://java.oracle.com/
path.separator = ;
java.vm.name = Java HotSpot(TM) Client VM
file.encoding.pkg = sun.io
user.script =
user.country = CN
sun.java.launcher = SUN_STANDARD
sun.os.patch.level = Service Pack 3
java.vm.specification.name = Java Virtual Machine Specification
user.dir = C:\Documents and Settings\iridium\My Documents\eclipse_jee_workspace\helloworld
java.runtime.version = 1.7.0_01-b08
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs = C:\Program Files\Java\jre7\lib\endorsed
os.arch = x86
java.io.tmpdir = C:\DOCUME~1\iridium\LOCALS~1\Temp\
line.separator =
java.vm.specification.vendor = Oracle Corporation
user.variant =
os.name = Windows XP
sun.jnu.encoding = GB18030
java.library.path = C:\Program Files\Java\jre7\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jre7/bin/client;C:/Program Files/Java/jre7/bin;C:/Program Files/Java/jre7/lib/i386;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files\MySQL\MySQL Server 5.5\bin;C:\Program Files\TortoiseHg\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\ICBCEbankTools\Gemplus\GemSafe Libraries\BIN\;C:\Program Files\eclipse-jee-indigo-SR1-win32\eclipse;;.
java.specification.name = Java Platform API Specification
java.class.version = 51.0
sun.management.compiler = HotSpot Client Compiler
os.version = 5.1
user.home = C:\Documents and Settings\iridium
user.timezone =
java.awt.printerjob = sun.awt.windows.WPrinterJob
file.encoding = GB18030
java.specification.version = 1.7
user.name = iridium
java.class.path = C:\Documents and Settings\iridium\My Documents\eclipse_jee_workspace\helloworld\bin
java.vm.specification.version = 1.7
sun.arch.data.model = 32
java.home = C:\Program Files\Java\jre7
sun.java.command = HelloWorld001
java.specification.vendor = Oracle Corporation
user.language = zh
awt.toolkit = sun.awt.windows.WToolkit
java.vm.info = mixed mode, sharing
java.version = 1.7.0_01
java.ext.dirs = C:\Program Files\Java\jre7\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
sun.boot.class.path = C:\Program Files\Java\jre7\lib\resources.jar;C:\Program Files\Java\jre7\lib\rt.jar;C:\Program Files\Java\jre7\lib\sunrsasign.jar;C:\Program Files\Java\jre7\lib\jsse.jar;C:\Program Files\Java\jre7\lib\jce.jar;C:\Program Files\Java\jre7\lib\charsets.jar;C:\Program Files\Java\jre7\classes
java.vendor = Oracle Corporation
file.separator = \
java.vendor.url.bug = http://bugreport.sun.com/bugreport/
sun.cpu.endian = little
sun.io.unicode.encoding = UnicodeLittle
sun.desktop = windows
sun.cpu.isalist =

2. Debian wheezy of DELL 1501

java.runtime.name = OpenJDK Runtime Environment
sun.boot.library.path = /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/amd64
java.vm.version = 23.25-b01
java.vm.vendor = Sun Microsystems Inc.
java.vendor.url = http://java.sun.com/
path.separator = :
java.vm.name = OpenJDK 64-Bit Server VM
file.encoding.pkg = sun.io
user.country = CN
sun.java.launcher = SUN_STANDARD
sun.os.patch.level = unknown
java.vm.specification.name = Java Virtual Machine Specification
user.dir = /home/iridium/eclipse/workspace/helloworld
java.runtime.version = 1.6.0_32-b32
java.awt.graphicsenv = sun.awt.X11GraphicsEnvironment
java.endorsed.dirs = /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/endorsed
os.arch = amd64
java.io.tmpdir = /tmp
line.separator =
java.vm.specification.vendor = Sun Microsystems Inc.
os.name = Linux
sun.jnu.encoding = UTF-8
java.library.path = /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/amd64/server:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/amd64:/usr/lib/jvm/java-6-openjdk-amd64/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib/jni:/lib:/usr/lib
java.specification.name = Java Platform API Specification
java.class.version = 50.0
sun.management.compiler = HotSpot 64-Bit Tiered Compilers
os.version = 3.2.0-4-amd64
user.home = /home/iridium
user.timezone =
java.awt.printerjob = sun.print.PSPrinterJob
file.encoding = UTF-8
java.specification.version = 1.6
user.name = iridium
java.class.path = /home/iridium/eclipse/workspace/helloworld/bin:/home/iridium/Downloads/netty-4.0.24.Final/jar/all-in-one/netty-all-4.0.24.Final.jar
java.vm.specification.version = 1.0
sun.arch.data.model = 64
java.home = /usr/lib/jvm/java-6-openjdk-amd64/jre
sun.java.command = HelloWorld001
java.specification.vendor = Sun Microsystems Inc.
user.language = zh
java.vm.info = mixed mode
java.version = 1.6.0_32
java.ext.dirs = /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext:/usr/java/packages/lib/ext
sun.boot.class.path = /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/resources.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/rt.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/jsse.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/jce.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/charsets.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/jfr.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/netx.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/plugin.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/rhino.jar:/usr/lib/jvm/java-6-openjdk-amd64/jre/classes
java.vendor = Sun Microsystems Inc.
java.awt.headless = true
file.separator = /
java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport.cgi
sun.cpu.endian = little
sun.io.unicode.encoding = UnicodeLittle
sun.desktop = gnome
sun.cpu.isalist =