`String.contains` was introduced in Java 5. Some code in java.naming still uses old approach with `String.indexOf` to check if String contains specified substring. I propose to migrate such usages. Makes code shorter and easier to read.
------------- Commit messages: - [PATCH] Use String.contains() instead of String.indexOf() in java.naming Changes: https://git.openjdk.java.net/jdk/pull/8938/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8938&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8287497 Stats: 13 lines in 4 files changed: 0 ins; 0 del; 13 mod Patch: https://git.openjdk.java.net/jdk/pull/8938.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8938/head:pull/8938 PR: https://git.openjdk.java.net/jdk/pull/8938
