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Setting java properties

 
Ed Zeval
Greenhorn
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Hi,

I was wondering how to set some java properties. I don't want to pass in the key/value pairs in the command line (as "-Dkey=value). Is there a way to set them in the code?

Thanks!!
 
Ernest Friedman-Hill
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Yes; the setProperty() method in the java.lang.System class can set these. Be careful because some properties take effect during JVM startup, and using setProperty() for these will not have the intended effect.
 
Ed Zeval
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Cool, thanks. That worked.

Now... I saw that the System.set/getProperty() methods may throw a SecurityException if I'm running a SecurityManager and I don't have permissions.

What is a SecurityManager and how do I get the necessary permissions in case I don't have them?

Thanks!
 
Norm Radder
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I think you can use policytool that comes with the jre(?)/jdk install to give your program permissions. The permissions would have to be set on every computer that you run your program on.
You'll have to read a tutorial to understand how to use policytool. In some cases I've have to manually edit the .java.policy file to get the correct paths to give my programs permissions. There has been a lot of try this, try that until I've been able to give my programs permissions.
Perhaps you won't have to do this.
 
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