RFR: 8269383: New java.nio.ByteOrder.isBigEndian and isLittleEndian methods

[Yi Yang]

Hi, can I have a review of this change that adds two new utility methods for java.nio.ByteOrder? Looking through the whole JDK codebase, most calls of ByteOrder.nativeOrder() is to check if the underlying platform is little-endian/big-endian. There is no reason to only provide ByteOrder.nativeOrder while leaving big-endian/little-endian checking methods blank.

Thanks!

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Commit messages:
 - add new methods

Changes: https://git.openjdk.java.net/jdk/pull/4595/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4595&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269383
  Stats: 20 lines in 1 file changed: 20 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4595.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4595/head:pull/4595

PR: https://git.openjdk.java.net/jdk/pull/4595