so why do you think your perl variabe has to be named app1.url?

"properties" does not describe ipc such as system

app1.url is probably just a string you give as an argument to the java program 

system $java, $jar, @otherargs, 'app1.url=yadayada';

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In reply to Re^3: Using . in variable name by Anonymous Monk
in thread Using . in variable name by manpreet333

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