java1.5中访问环境变量

如： 

复制代码代码如下:

public class EnvTest { 
  public static void main(String args[]) { 
    System.out.println(System.getenv(args[0])); 
  } 
} 

运行结果：

 

C:\java>java    EnvTest OS 
Windows_NT

又如：  

 

复制代码代码如下:

import java.util.Map; 
public class EnvDump { 
public static void main(String args[]) { 
   for (Map.Entry entry: System.getenv().entrySet()) { 
      System.out.println(entry.getKey() + "=" + entry.getValue()); 
   } 
  } 
} 

 

运行结果：

C:\java>java   EnvDump 
PROCESSOR_ARCHITECTURE=x86 
LOGONSERVER=\\ZZ3Z100 
HOMEDRIVE=C: 
HOMEPATH=\Documents and Settings\Owner.LEGEND-A7R5PDTM 
SESSIONNAME=Console 
TMP=C:\DOCUME~1\OWNER~1.LEG\LOCALS~1\Temp 
java_home=c:\jdk1.5 
windir=C:\WINDOWS 
ant_home=c:\ant1.6 
PROCESSOR_IDENTIFIER=x86 Family 15 Model 2 Stepping 4, GenuineIntel 
SystemDrive=C: 
USERPROFILE=C:\Documents and Settings\Owner.LEGEND-A7R5PDTM 
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH 
CommonProgramFiles=C:\Program Files\Common Files 
NUMBER_OF_PROCESSORS=1 
ComSpec=C:\WINDOWS\system32\cmd.exe 
COMPUTERNAME=ZZ3Z100 
OS=Windows_NT 
USERNAME=Owner 
CLIENTNAME=Console 
=ExitCode=00000000 
TEMP=C:\DOCUME~1\OWNER~1.LEG\LOCALS~1\Temp 
USERDOMAIN=ZZ3Z100 
ALLUSERSPROFILE=C:\Documents and Settings\All Users.WINDOWS 
PROCESSOR_LEVEL=15 
SystemRoot=C:\WINDOWS 
classpath=c:\jdk1.5\lib;c:\java 
=C:=C:\java 
APPDATA=C:\Documents and Settings\Owner.LEGEND-A7R5PDTM\Application Data 
Path=C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;
c:\jdk1.5\bin;c:\ant1.6\bin 
PROMPT=$P$G 
PROCESSOR_REVISION=0204 
ProgramFiles=C:\Program Files

C:\java>