Testsuite name: Regression manual
Test name(s): javax/swing/JTable/KeyBoardNavigation/KeyBoardNavigation.java
Product(s) tested:JDK7,
                  JDK8
                  JDK11
                  JDK17
VM options used : -Dswing.defaultlaf=javax.swing.plaf.metal.MetalLookAndFeel
OS/architecture: Windows10
Reproducible: Always
Is it a Regression: No

As per the Instructions given in the Test to refer bug report 4112270 for JTable keyboard navigation spec

Testing Extending Selections in Tables

Expected behavior: Press Control-shift up/down arrow extend selection to top/bottom of column.
Actual behavior: Press Control-shift up/down arrow does not extend selection to top/bottom of column , but extends selection up/down one row