Getting the user environment variable::Need help
Hi, I am on HP-UX and trying to access one user environment varaible from the Java code using System.getProperty() method but it is returning NULL. Can anyone point out why? This is what I did: $export TEST=testing $echo $TEST testing But when I execute System.getProperty(TEST) from my code, it returns NULL. Can any of you help? Thanks, Nilanjan
RE: Getting the user environment variable::Need help
1) This isn't a Tomcat question: if you'd done the same in a java application, you'd have found the same thing. There are forums, newsgroups, and mailing lists for Java questions. 2) You're confusing environment variables with properties. Properties are defined either by loading them from a properties file, or by specifying them on java's command line (with -D). 3) There is a method, System.getenv(), to get environment variables, but it's deprecated (the whole concept of environment variables is incredibly OS-specific). So you really _should_ be using properties, or context-param elements defined in your application's web.xml. Look at java.util.Properties for the former, and the servlet spec for the latter. -- Bill K. -Original Message- From: Nilanjan Das [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 07, 2001 7:12 AM To: tomcat jakarta Subject: Getting the user environment variable::Need help Hi, I am on HP-UX and trying to access one user environment varaible from the Java code using System.getProperty() method but it is returning NULL. Can anyone point out why? This is what I did: $export TEST=testing $echo $TEST testing But when I execute System.getProperty(TEST) from my code, it returns NULL. Can any of you help? Thanks, Nilanjan
RE: Getting the user environment variable::Need help
That said, do this: Properties props = System.getProperties(); props.put(MYVAR, MYVALUE); System.setProperties(props); Then later on in your program you can get the value to your hearts content. Or even in another class or package. Or use a wrapper to load shell variables. But if all you want to do load your own defined variables use the above code. At 07:33 AM 8/7/2001, you wrote: 1) This isn't a Tomcat question: if you'd done the same in a java application, you'd have found the same thing. There are forums, newsgroups, and mailing lists for Java questions. 2) You're confusing environment variables with properties. Properties are defined either by loading them from a properties file, or by specifying them on java's command line (with -D). 3) There is a method, System.getenv(), to get environment variables, but it's deprecated (the whole concept of environment variables is incredibly OS-specific). So you really _should_ be using properties, or context-param elements defined in your application's web.xml. Look at java.util.Properties for the former, and the servlet spec for the latter. -- Bill K. -Original Message- From: Nilanjan Das [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 07, 2001 7:12 AM To: tomcat jakarta Subject: Getting the user environment variable::Need help Hi, I am on HP-UX and trying to access one user environment varaible from the Java code using System.getProperty() method but it is returning NULL. Can anyone point out why? This is what I did: $export TEST=testing $echo $TEST testing But when I execute System.getProperty(TEST) from my code, it returns NULL. Can any of you help? Thanks, Nilanjan
Re: Getting the user environment variable::Need help
Hi, I basically want to load the shell variables. Can you tell me how I can do that? What is the wrapper class all about you mentioned? Thanks for your help. Thanks, Nilanjan *** Tim O'Neil wrote: That said, do this: Properties props = System.getProperties(); props.put(MYVAR, MYVALUE); System.setProperties(props); Then later on in your program you can get the value to your hearts content. Or even in another class or package. Or use a wrapper to load shell variables. But if all you want to do load your own defined variables use the above code. At 07:33 AM 8/7/2001, you wrote: 1) This isn't a Tomcat question: if you'd done the same in a java application, you'd have found the same thing. There are forums, newsgroups, and mailing lists for Java questions. 2) You're confusing environment variables with properties. Properties are defined either by loading them from a properties file, or by specifying them on java's command line (with -D). 3) There is a method, System.getenv(), to get environment variables, but it's deprecated (the whole concept of environment variables is incredibly OS-specific). So you really _should_ be using properties, or context-param elements defined in your application's web.xml. Look at java.util.Properties for the former, and the servlet spec for the latter. -- Bill K. -Original Message- From: Nilanjan Das [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 07, 2001 7:12 AM To: tomcat jakarta Subject: Getting the user environment variable::Need help Hi, I am on HP-UX and trying to access one user environment varaible from the Java code using System.getProperty() method but it is returning NULL. Can anyone point out why? This is what I did: $export TEST=testing $echo $TEST testing But when I execute System.getProperty(TEST) from my code, it returns NULL. Can any of you help? Thanks, Nilanjan
Re: Getting the user environment variable::Need help
You write a shell script that loads the variable into a java parameter to the jvm; #!/bin/sh java -DMYVAR=$MYVAR myCoolClass Use the root shell if possible, not the k shell, your code below looked like K Shell parlance. At 09:41 AM 8/7/2001, you wrote: Hi, I basically want to load the shell variables. Can you tell me how I can do that? What is the wrapper class all about you mentioned? Thanks for your help. Thanks, Nilanjan *** Tim O'Neil wrote: That said, do this: Properties props = System.getProperties(); props.put(MYVAR, MYVALUE); System.setProperties(props); Then later on in your program you can get the value to your hearts content. Or even in another class or package. Or use a wrapper to load shell variables. But if all you want to do load your own defined variables use the above code. At 07:33 AM 8/7/2001, you wrote: 1) This isn't a Tomcat question: if you'd done the same in a java application, you'd have found the same thing. There are forums, newsgroups, and mailing lists for Java questions. 2) You're confusing environment variables with properties. Properties are defined either by loading them from a properties file, or by specifying them on java's command line (with -D). 3) There is a method, System.getenv(), to get environment variables, but it's deprecated (the whole concept of environment variables is incredibly OS-specific). So you really _should_ be using properties, or context-param elements defined in your application's web.xml. Look at java.util.Properties for the former, and the servlet spec for the latter. -- Bill K. -Original Message- From: Nilanjan Das [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 07, 2001 7:12 AM To: tomcat jakarta Subject: Getting the user environment variable::Need help Hi, I am on HP-UX and trying to access one user environment varaible from the Java code using System.getProperty() method but it is returning NULL. Can anyone point out why? This is what I did: $export TEST=testing $echo $TEST testing But when I execute System.getProperty(TEST) from my code, it returns NULL. Can any of you help? Thanks, Nilanjan
