Bulk Operation

LANG-1547 Change removeLastFieldSeparator to use endsWith

LANG-1547 Use Collections.singletonList insteadof Arrays.asList when there be only one element.

LANG-1547 Use StandardCharsets.UTF_8

LANG-1547 Use Math.max and min

LANG-1547 Use List.sort instead of Collection.sort

LANG-1547 Refine Javadoc

LANG-1547 Convert Sting to StringBuilder in some test code.

LANG-1547 Simplify if as some conditions are covered by others 

LANG-1547 Change a Pattern to a static final field, for not letting it compile each time the function invoked.

LANG-1547 Use Java 8 lambdas and Map operations

LANG-1547 Ignored exception `ignored`, should not be called so

LANG-1547 Fix typos

LANG-1547 Change array style from `int a[]` to `int[] a`

LANG-1547 Change from addAll to constructors for some List.