Open Hive Shell
Step 1
hive> ADD JAR <path-of-the-JAR-file>
Step 2
hive> CREATE TEMPORARY FUNCTION DateConverter AS 'com.ibm.logic.HiveUDF';
Testing
hive> select DateConverter("160627","yyMMdd");
=> 2016-06-27
hive> select DateConverter('062716','MMddyy');
=> 2016-06-27