getEnv : Java Glossary

by Roedy Green ©1996-2008 Canadian Mind Products
Go to : punctuation 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z (all)

getEnv

System.getEnv, to get at environment parameters, has been deprecated. What do you do instead?

Use a properties file
This has the advantage of being platform independent.
Use the <APPLET <PARAM tags
which generate a Property. This only works for Applets.
Pass the parameters in on the command line
There are several ways of doing this. These techniques only work in applications, not Applets.
- Named parm technique
  the string "flavour=strawberry" will appear as arg[0] in your main method.
```
java.exe MyClass flavour=strawberry
```
- Simple parm replacement technique
  the string "strawberry" will appear as arg[0] in your main method. The % works in Windows, NT, 4DOS and 4NT. You may need to do something slightly different in other OSes.
```
set flavour=strawberry
java.exe MyClass %flavour%
```
- -D technique
  System property flavour with value "strawberry " will be accessible via System.getProperty("flavour"); Make sure you put the -D before your classname or else you will find "-Dflavour=strawberry " appearing at arg[0] instead. Contrary to rumour, this feature is also available in JDK 1.1. Make sure you use an upper case D.
```
set flavour=strawberry
java.exe -Dflavour=%flavour% MyClass
```

	Please email your feedback for publication, errors, omissions, broken/redirected link reports and suggestions to improve this page to Roedy Green :
	Canadian Mind Products
	mindprod.com IP:[65.110.21.43]
	Your face IP:[38.103.63.17]	The information on this page is for non-military use only.
	You are visitor number 10,927.	Military use includes use by defence contractors.
	You can get a fresh copy of this page from:	or possibly from your local J: drive (Java virtual drive/Mindprod website mirror)
	http://mindprod.com/jgloss/getenv.html	J:\mindprod\jgloss\getenv.html

Use a properties file