Reading Environment variables in java ..

[MaheshRathi]

Hi,

I want to read some environment variables inside java code. I am not able to use System.getProperty() as it can read only some variables which are predefined. My requirement is -
1. I am declaring a variable and exporting it before execution of code starts.
2. i want to access the value of that variable in my java code.

Appreciate, if someone can provide me some guidelines or some pointers.

thanks in advance,
Mahesh

 

[palbano]

Java does not support reading/writing environment variables as they are OS dependent. You should look at using JNI if you need that functionality.

-pete

 

[ganeshmb]

If the idea behind having these environment variables is just to configure some environment-specific parameters outside the Java code, you can try this instead.

Register the property using -D flag while you invoke your java application. This will be accessible inside java code with System.getProperty(). For instance, if you invoke your application as,

 java [b]-Dmyvariable=xyz[/b] com.abc.MyApplication

Now System.getProperty("myvariable&quot will return xyz inside Java code.

Hope this helps!


Ganesh
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[ganeshmb]

Oops! these TGML tags are killing me. The command-line invokation should read,

java -Dmyvariable=xyz com.abc.MyApplication

Sorry about that..


Ganesh
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