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 Environmentsun.boot.library.path=C:\Users\lenovo\AppData\Local\MyEclip...java.vm.version=11.3-b02java.vm.vendor=Sun Microsystems Inc.java.vendor.url=http://java.sun.com/path.separator=;java.vm.name=Java HotSpot(TM) 64-Bit Server VMfile.encoding.pkg=sun.iouser.country=CNsun.java.launcher=SUN_STANDARDsun.os.patch.level=Service Pack 1java.vm.specification.name=Java Virtual Machine Specificationuser.dir=H:\Workspaces\MyEclipse 9\examplejava.runtime.version=1.6.0_13-b03java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironmentjava.endorsed.dirs=C:\Users\lenovo\AppData\Local\MyEclip...os.arch=amd64java.io.tmpdir=C:\Users\lenovo\AppData\Local\Temp\line.separator=java.vm.specification.vendor=Sun Microsystems Inc.user.variant=os.name=Windows Vistasun.jnu.encoding=GBKjava.library.path=C:\Users\lenovo\AppData\Local\MyEclip...java.specification.name=Java Platform API Specificationjava.class.version=50.0sun.management.compiler=HotSpot 64-Bit Server Compileros.version=6.1user.home=C:\Users\lenovouser.timezone=java.awt.printerjob=sun.awt.windows.WPrinterJobfile.encoding=GBKjava.specification.version=1.6user.name=lenovojava.class.path=H:\Workspaces\MyEclipse 9\example\binjava.vm.specification.version=1.0sun.arch.data.model=64java.home=C:\Users\lenovo\AppData\Local\MyEclip...java.specification.vendor=Sun Microsystems Inc.user.language=zhawt.toolkit=sun.awt.windows.WToolkitjava.vm.info=mixed modejava.version=1.6.0_13java.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=littlesun.io.unicode.encoding=UnicodeLittlesun.desktop=windowssun.cpu.isalist=amd64