Not very well optimized script for searching recursively with regular expresions in several jar files. TO IMPROVE

findInJars.sh

#!/bin/bash

function usage() {
    echo "usage: findInJars <path> <regexp>"
    exit 1
}

[ $# -ne 2 ] && usage

jar=$(which jar)

path=$1
class=$2

[ $? -ne 0 ] && echo "No jar executable found in your PATH"

find $path -name '*.jar' | while read jarFile; do

    $jar tvf $jarFile | grep $class > /dev/null
    if [ $? -eq 0 ]; then

        echo "**********************************************************************************"
        echo "Class $class found on jar $jarFile"
        echo "**********************************************************************************"
        $jar tvf $jarFile | grep $class
    fi

done