Looking for a package into JAR files

A nice script for using in Linux, when looking for some package into JAR files.

#!/bin/sh

# setting where java exists
JAVA_HOME=/opt/java

# what are you looking for? put here the package
LOOK_FOR="org/springframework/context/annotation"

# looping looking for
for i in `find . -name "*jar"`
do
echo "Looking in $i ..."
$JAVA_HOME/bin/jar tvf $i | grep $LOOK_FOR > /dev/null
if [ $? = 0 ] then
echo "==> Found \"$LOOK_FOR\" in $i"
fi
done