ExcelComparator: Adjust iterating rows/columns
Run this sample as part of the integration tests
Open the files read-only to not re-write them with changed content
Add null-checks and use toString() to prevent exceptions with certain files

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1860688 13f79535-47bb-0310-9956-ffa450edef68
2 files changed