Hi ,
I wrote following code to access Environment Variable "CLASSPATH".
But it is always giving null.
But when doing[ echo $CLASSPATH ] in shell I am getting value.
import java.io.*;
class Li
{
publicstaticvoid main (String[] args)
{
String s = System.getProperty("CLASSPATH");
System.out.println(s);
}
}
Java's system properties are not the same as the operating system's variables.
Try:String s = System.getProperty("java.class.path");
You might want to check out the documentation for getProperties here:
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/System.html
Yes I tried above two methods also
String s = System.getProperty("file_name");giving null as output
String s = System.getProperty("file_name"); is giving followig compilation error :
Note: Li.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.
When I run itgiving following error :
Exception in thread "main" java.lang.Error: getenv no longer supported, use properties and -D instead: input
at java.lang.System.getenv(System.java:691)
at Li.main(Li.java:6)
Hi ,
I triled that one also.
String s = System.getenv("file_name");
Compilation error is coming. I ignore that when I run that I am gettinh following error:
Exception in thread "main" java.lang.Error: getenv no longer supported, use properties and -D instead: input
at java.lang.System.getenv(System.java:691)
at Li.main(Li.java:6)
> Compilation error is coming.
There is a difference between a compiler error and a compiler warning.
If you are getting an error then either your code is wrong or you are using a very non-standard compiler.
A warning means that the class file was created. Whether it works (runtime) at that point depends on the version of java that you are using.
1.3 and 1.5 will work. 1.4 will not.
Here's a Windows example - I don't have a 1.4 compiler/runtime handy to test it.public class VarEg {
/*
* javac -cp . VarEg
*
* set eg_var=foo
* java -cp . -Deg.var=%eg_var% VarEg
*/
public static void main(String[] args) {
// output: var=foo
System.out.println("var=" + System.getProperty("eg.var"));
}
}
> I dont find any way to access user defined
> environments till now.
> in replies i got some solutions but all are givng
> null as output.
Then you are doing something wrong. Since you didn't provide information on what you attempted it isn't possible to say what is wrong.
