java - strange behaviour : export CLASSPATH=$(JARS=(./lib/*.jar); IFS=:; echo "${JARS[*]}") -

- 

export classpath=$(jars=(./lib/*.jar); ifs=:; echo "${jars[*]}")

if put line in bash_script.sh , 

chmod +x bash_script.sh

and run 

./bash_script.sh

it gives error.

syntax error: "(" unexpected (expecting ")")

how ever able run thing directly prompt , expected result. as

$ export classpath=$(jars=(./lib/*.jar); ifs=:; echo "${jars[*]}")

i wondering reason strange behaviour.

make sure have #!/bin/bash @ top of shell script. array syntax var=(...) bash-ism. won't work in plain sh (#!/bin/sh).

by way, looks line my answer here. if so, encourage use updated solution rather this.

there's no need manually build classpath list. java supports convenient wildcard syntax directories containing jar files.

java -cp "$lib/*"

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