确定当前的系统属性

public class ShowProperties {
	public static void main(String args[]){
		System.getProperties().list(System.out);
	}
}///:~output
-- listing properties --
java.runtime.name=Java(TM) SE Runtime Environment
sun.boot.library.path=C:\Users\lenovo\AppData\Local\MyEclip...
java.vm.version=11.3-b02
java.vm.vendor=Sun Microsystems Inc.
java.vendor.url=http://java.sun.com/
path.separator=;
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
file.encoding.pkg=sun.io
user.country=CN
sun.java.launcher=SUN_STANDARD
sun.os.patch.level=Service Pack 1
java.vm.specification.name=Java Virtual Machine Specification
user.dir=H:\Workspaces\MyEclipse 9\example
java.runtime.version=1.6.0_13-b03
java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs=C:\Users\lenovo\AppData\Local\MyEclip...
os.arch=amd64
java.io.tmpdir=C:\Users\lenovo\AppData\Local\Temp\
line.separator=

java.vm.specification.vendor=Sun Microsystems Inc.
user.variant=
os.name=Windows Vista
sun.jnu.encoding=GBK
java.library.path=C:\Users\lenovo\AppData\Local\MyEclip...
java.specification.name=Java Platform API Specification
java.class.version=50.0
sun.management.compiler=HotSpot 64-Bit Server Compiler
os.version=6.1
user.home=C:\Users\lenovo
user.timezone=
java.awt.printerjob=sun.awt.windows.WPrinterJob
file.encoding=GBK
java.specification.version=1.6
user.name=lenovo
java.class.path=H:\Workspaces\MyEclipse 9\example\bin
java.vm.specification.version=1.0
sun.arch.data.model=64
java.home=C:\Users\lenovo\AppData\Local\MyEclip...
java.specification.vendor=Sun Microsystems Inc.
user.language=zh
awt.toolkit=sun.awt.windows.WToolkit
java.vm.info=mixed mode
java.version=1.6.0_13
java.ext.dirs=C:\Users\lenovo\AppData\Local\MyEclip...
sun.boot.class.path=C:\Users\lenovo\AppData\Local\MyEclip...
java.vendor=Sun Microsystems Inc.
file.separator=\
java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport...
sun.cpu.endian=little
sun.io.unicode.encoding=UnicodeLittle
sun.desktop=windows
sun.cpu.isalist=amd64
 

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