关于java system.getproperty的使用

1. public class Information {     
2.      public static void main(String args[]) {     
3.          System.out.println("java_vendor:" + System.getProperty("java.vendor"));     
4.          System.out.println("java_vendor_url:"     
5.                  + System.getProperty("java.vendor.url"));     
6.          System.out.println("java_home:" + System.getProperty("java.home"));     
7.          System.out.println("java_class_version:"     
8.                  + System.getProperty("java.class.version"));     
9.          System.out.println("java_class_path:"     
10.                 + System.getProperty("java.class.path"));     
11.         System.out.println("os_name:" + System.getProperty("os.name"));     
12.         System.out.println("os_arch:" + System.getProperty("os.arch"));     
13.         System.out.println("os_version:" + System.getProperty("os.version"));     
14.         System.out.println("user_name:" + System.getProperty("user.name"));     
15.         System.out.println("user_home:" + System.getProperty("user.home"));     
16.         System.out.println("user_dir:" + System.getProperty("user.dir"));     
17.         System.out.println("java_vm_specification_version:"     
18.                 + System.getProperty("java.vm.specification.version"));     
19.         System.out.println("java_vm_specification_vendor:"     
20.                 + System.getProperty("java.vm.specification.vendor"));     
21.         System.out.println("java_vm_specification_name:"     
22.                 + System.getProperty("java.vm.specification.name"));     
23.         System.out.println("java_vm_version:"     
24.                 + System.getProperty("java.vm.version"));     
25.         System.out.println("java_vm_vendor:"     
26.                 + System.getProperty("java.vm.vendor"));     
27.         System.out     
28.                 .println("java_vm_name:" + System.getProperty("java.vm.name"));     
29.         System.out.println("java_ext_dirs:"     
30.                 + System.getProperty("java.ext.dirs"));     
31.         System.out.println("file_separator:"     
32.                 + System.getProperty("file.separator"));     
33.         System.out.println("path_separator:"     
34.                 + System.getProperty("path.separator"));     
35.         System.out.println("line_separator:"     
36.                 + System.getProperty("line.separator"));     
37.     }     
38. }  

public class Information {   
     public static void main(String args[]) {   
         System.out.println("java_vendor:" + System.getProperty("java.vendor"));   
         System.out.println("java_vendor_url:"   
                 + System.getProperty("java.vendor.url"));   
         System.out.println("java_home:" + System.getProperty("java.home"));   
         System.out.println("java_class_version:"   
                 + System.getProperty("java.class.version"));   
         System.out.println("java_class_path:"   
                + System.getProperty("java.class.path"));   
        System.out.println("os_name:" + System.getProperty("os.name"));   
        System.out.println("os_arch:" + System.getProperty("os.arch"));   
        System.out.println("os_version:" + System.getProperty("os.version"));   
        System.out.println("user_name:" + System.getProperty("user.name"));   
        System.out.println("user_home:" + System.getProperty("user.home"));   
        System.out.println("user_dir:" + System.getProperty("user.dir"));   
        System.out.println("java_vm_specification_version:"   
                + System.getProperty("java.vm.specification.version"));   
        System.out.println("java_vm_specification_vendor:"   
                + System.getProperty("java.vm.specification.vendor"));   
        System.out.println("java_vm_specification_name:"   
                + System.getProperty("java.vm.specification.name"));   
        System.out.println("java_vm_version:"   
                + System.getProperty("java.vm.version"));   
        System.out.println("java_vm_vendor:"   
                + System.getProperty("java.vm.vendor"));   
        System.out   
                .println("java_vm_name:" + System.getProperty("java.vm.name"));   
        System.out.println("java_ext_dirs:"   
                + System.getProperty("java.ext.dirs"));   
        System.out.println("file_separator:"   
                + System.getProperty("file.separator"));   
        System.out.println("path_separator:"   
                + System.getProperty("path.separator"));   
        System.out.println("line_separator:"   
                + System.getProperty("line.separator"));   
    }   
}

From jdk 1.5.0 documents
java.version
Java 运行时环境版本

java.vendor
Java 运行时环境供应商

java.vendor.url
Java 供应商的 URL

java.home
Java 安装目录

java.vm.specification.version
Java 虚拟机规范版本

java.vm.specification.vendor
Java 虚拟机规范供应商

java.vm.specification.name
Java 虚拟机规范名称

java.vm.version
Java 虚拟机实现版本

java.vm.vendor
Java 虚拟机实现供应商

java.vm.name
Java 虚拟机实现名称

java.specification.version
Java 运行时环境规范版本

java.specification.vendor
Java 运行时环境规范供应商

java.specification.name
Java 运行时环境规范名称

java.class.version
Java 类格式版本号

java.class.path
Java 类路径

java.library.path
加载库时搜索的路径列表

java.io.tmpdir
默认的临时文件路径

java.compiler
要使用的 JIT 编译器的名称

java.ext.dirs
一个或多个扩展目录的路径

os.name
操作系统的名称

os.arch
操作系统的架构

os.version
操作系统的版本

file.separator
文件分隔符（在 UNIX 系统中是“/”）

path.separator
路径分隔符（在 UNIX 系统中是“:”）

line.separator
行分隔符（在 UNIX 系统中是“/n”）

user.name
用户的账户名称

user.home
用户的主目录

user.dir
用户的当前工作目录