Properties props=System getProperties()//系统属性
System out println( Java的运行环境版本 +props getProperty( java version ))
System out println( Java的运行环境供应商 +props getProperty( java vendor ))
System out println( Java供应商的URL +props getProperty( java vendor url ))
System out println( Java的安装路径 +props getProperty( java home ))
System out println( Java的虚拟机规范版本 +props getProperty( java vm specification version ))
System out println( Java的虚拟机规范供应商 +props getProperty( java vm specification vendor ))
System out println( Java的虚拟机规范名称 +props getProperty( java vm specification name ))
System out println( Java的虚拟机实现版本 +props getProperty( java vm version ))
System out println( Java的虚拟机实现供应商 +props getProperty( java vm vendor ))
System out println( Java的虚拟机实现名称 +props getProperty( java vm name ))
System out println( Java运行时环境规范版本 +props getProperty( java specification version ))
System out println( Java运行时环境规范供应商 +props getProperty( java specification vender ))
System out println( Java运行时环境规范名称 +props getProperty( java specification name ))
System out println( Java的类格式版本号 +props getProperty( java class version ))
System out println( Java的类路径 +props getProperty( java class path ))
System out println( 加载库时搜索的路径列表 +props getProperty( java library path ))
System out println( 默认的临时文件路径 +props getProperty( java io tmpdir ))
System out println( 一个或多个扩展目录的路径 +props getProperty( java ext dirs ))
System out println( 操作系统的名称 +props getProperty( os name ))
System out println( 操作系统的构架 +props getProperty( os arch ))
System out println( 操作系统的版本 +props getProperty( os version ))
System out println( 文件分隔符 +props getProperty( file separator )) //在 unix 系统中是"/"
System out println( 路径分隔符 +props getProperty( path separator )) //在 unix 系统中是":"
System out println( 行分隔符 +props getProperty( line separator )) //在 unix 系统中是"/n"
System out println( 用户的账户名称 +props getProperty( user name ))
System out println( 用户的主目录 +props getProperty( user home ))
System out println( 用户的当前工作目录 +props getProperty( user dir ))
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