Access environment variables in java1.5

Such as:

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

Operation results:

C: \ java> Java      EnvTest OS
Windows_NT

Such as:    

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()); 
   } 
  } 
} 

Operation results:

C: \ java> Java    EnvDump
PROCESSOR_ARCHITECTURE = x86
LOGONSERVER = \ \ ZZ3Z100
HOMEDRIVE = C:
HOMEPATH = \ Documents and Settings \ Owner LEGEND - A7R5PDTM
SESSIONNAME = the Console
TMP = C: \ DOCUME ~ 1 \ OWNER ~ 1. Legs \ LOCALS ~ 1 \ Temp
The 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 varies; .js; . The JSE; . WSF; . WSH
CommonProgramFiles = C: \ Program Files \ Common Files
NUMBER_OF_PROCESSORS = 1
ComSpec = C: \ WINDOWS \ system32 \ CMD exe
COMPUTERNAME = ZZ3Z100
OS = Windows_NT
The USERNAME = Owner
CLIENTNAME = the Console
= ExitCode = 00000000
TEMP = C: \ DOCUME ~ 1 \ OWNER ~ 1. Legs \ LOCALS ~ 1 \ TEMP
USERDOMAIN = ZZ3Z100
ALLUSERSPROFILE = C: \ Documents and Settings \ All Users WINDOWS
PROCESSOR_LEVEL = 15
SystemRoot = C: \ WINDOWS
The 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>