System.getProperty() 参数大全(原创！)

System.getProperty() 参数大全(原创！)

今天用到了System.getProperty("user.dir") 同时想了解一下System.getProperty()究竟还有什么参数, 先上网搜了一下，结果n个弯也内容如下：

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
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

一共28个，于是自己写了一个小东西测试一下，结果如下：
java.runtime.name
sun.boot.library.path
java.vm.version
java.vm.vendor
java.vendor.url
path.separator
java.vm.name
file.encoding.pkg
user.country
sun.java.launcher
sun.os.patch.level
java.vm.specification.name
user.dir
java.runtime.version
java.awt.graphicsenv
java.endorsed.dirs
os.arch
java.io.tmpdir
line.separator
java.vm.specification.vendor
user.variant
os.name
sun.jnu.encoding
java.library.path
java.specification.name
java.class.version
sun.management.compiler
os.version
user.home
user.timezone
java.awt.printerjob
file.encoding
java.specification.version
user.name
java.class.path
java.vm.specification.version
sun.arch.data.model
java.home
java.specification.vendor
user.language
awt.toolkit
java.vm.info
java.version
java.ext.dirs
sun.boot.class.path
java.vendor
file.separator
java.vendor.url.bug
sun.cpu.endian
sun.io.unicode.encoding
sun.desktop
sun.cpu.isalist
******************共计 ：52 个！*******************
但愿java的计数器别出错！
出入很大啊！现在给出代码啦！

 1  import  java.util. * ; 
 2 
 3  public   class  TestProperty{
 4       public   static   void  main(String[] agrs){
 5          Properties properties  =  System.getProperties();
 6           int  i  =   0 ;
 7           for  (Enumeration e  =  properties.propertyNames(); e.hasMoreElements() ;) {
 8              System.out.println(e.nextElement());            
 9              i ++ ;
10           }
11           
12           System.out.println( " ******************共计 ： " + i + "  个！******************* " );
13           System.out.println( " ==================具体含义自己看！==================== " );
14           
15            for  (Enumeration e  =  properties.propertyNames(); e.hasMoreElements() ;) {
16              String str  =  e.nextElement().toString();            
17              System.out.println( " key =  " + str + "  ||  value =  " + System.getProperty(str));
18           }
19 
20      } 
21  }

嘿嘿！现丑了！！