Add null condition on the second grep.

27-01-2021-grepString/grepHttp.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 out=`find . -name '*.java' -exec grep 'http://' /dev/null {} +`
 echo "${out}"
-if [[ "$(grep '\.java' <<< ${out})" ]]; then
+if [[  -n "${out}" && "$(grep '\.java' <<< ${out})" ]]; then
     echo "HTTP protocol found"
 else
     echo "HTTP protocol not found"