liyafan82 commented on a change in pull request #7354:
URL: https://github.com/apache/arrow/pull/7354#discussion_r436429167
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File path: docs/source/java/vector.rst
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@@ -118,6 +118,28 @@ Some points to note about the steps above:
no longer used, to avoid resource leak. To make sure of this, it is
recommended to place vector related operations
into a try-with-resources block.
+* For fixed width vectors (e.g. IntVector), we can set values at different
indices in arbitrary orders.
+ For variable width vectors (e.g. VarCharVector), however, we must set values
in non-decreasing order of the
+ indices. Otherwise, the values after the set positiion will become invalid.
For example, suppose we use the
+ following statements to populate a variable width vector:
+
+.. code-block:: Java
+
+ VarCharVector vector = new VarCharVector("vector", allocator)) {
Review comment:
Typo fixed. Thanks a lot for your careful review.
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