I have a Google cloud storage bucket with following structure Gs://myBucket/folder1/1.txt Gs://myBucket/folder2/1.txt Gs://myBucket/folder3/3.txt
I wish to know using Java api which all folders contain file with name 1.txt. in my above example it will be folder1 and folder2
Folders aren't a resource in Google Cloud Storage (GCS), see Folders.
The only resource that Buckets may contain are Objects.
There isn't a Folder resource in GCS Buckets that you can grab a handle to and which contains File things.
Object names permit "/" and many tools manifest this as if it were a directory path separator (but it really isn't).
You will need to iterate over every object (see: List and pattern-match on every Object name ending e.g. 1.txt.
