System.getProperty(String key)的用法

System.getProperty(String key)是个很有用的方法，这个方法很简单，使用中主要问题是这个函数的参数key是系统预设的。下面列出的是sunJava doc里面给出的key值：

KeyDescription of Associated Valuejava.versionJava Runtime Environment versionjava.vendorJava Runtime Environment vendorjava.vendor.urlJava vendor URLjava.homeJava installation directoryjava.vm.specification.versionJava Virtual Machine specification versionjava.vm.specification.vendorJava Virtual Machine specification vendorjava.vm.specification.nameJava Virtual Machine specification namejava.vm.versionJava Virtual Machine implementation versionjava.vm.vendorJava Virtual Machine implementation vendorjava.vm.nameJava Virtual Machine implementation namejava.specification.versionJava Runtime Environment specification versionjava.specification.vendorJava Runtime Environment specification vendorjava.specification.nameJava Runtime Environment specification namejava.class.versionJava class format version numberjava.class.pathJava class pathjava.library.pathList of paths to search when loading librariesjava.io.tmpdirDefault temp file pathjava.compilerName of JIT compiler to usejava.ext.dirsPath of extension directory or directoriesos.nameOperating system nameos.archOperating system architectureos.versionOperating system versionfile.separatorFile separator ("/" on UNIX)path.separatorPath separator (":" on UNIX)line.separatorLine separator ("/n" on UNIX)user.nameUser's account nameuser.homeUser's home directoryuser.dirUser's current working directory

 

url：http://java.sun.com/j2se/1.5.0/docs/api/java/lang/System.html#getProperties()

 

这些key值是常用的，不同的系统还有不同的key值。如果想查看当前系统的其他属性key值，可用下面的语句：

    java.util.Properties properties = System.getProperties();
    properties.list(System.out);