JAVA 4 giving error for java.lang.Error: getenv no longer supported, use properties and -D instead:

[lekurwale amol]

Hi,

I need to access env variables (System variables)
But for System.getenv("Path") it am getting

java.lang.Error: getenv no longer supported, use properties and -D instead: Path
at java.lang.System.getenv(System.java:689)

How do I access system variables in Java 4.

Regards,
Amol

[Henry Wong]

Yeah. Java went through a silly phase where they deprecated access to environment variables -- and actually changed it to return an error. The reasoning being that not all OSes supported environment variables. This was, of course, undone later.

The easiest solution is to do what the message says. Change your shellscript to use the -D option to assign the environment value to a system property, and in the program, use the system property instead.

Henry

[Ernest Friedman-Hill]

Or use a newer JVM, of course.

[Campbell Ritchie]

Ernest Friedman-Hill wrote:Or use a newer JVM, of course.

Agree; are you using Java1.4 which was withdrawn the best part of 6 years ago?

[lekurwale amol]

Henry Wong wrote:
Change your shellscript to use the -D option to assign the environment value to a system property, and in the program, use the system property instead.

Henry

Henry,
Could you give an example of how to do this?

[Henry Wong]

lekurwale amol wrote:
Could you give an example of how to do this?

Please search the forums. This topic has come up before. For example, I just did a search for "system properties" and this was the first hit...

https://coderanch.com/t/178539/java-SCJA/certification/java-command-line-option-good

Henry