Index: src/main/java/common/javax/swing/plaf/basic/BasicSplitPaneUI.java =================================================================== --- src/main/java/common/javax/swing/plaf/basic/BasicSplitPaneUI.java (revision 494856) +++ src/main/java/common/javax/swing/plaf/basic/BasicSplitPaneUI.java (working copy) @@ -714,6 +714,9 @@ } public int getDividerLocation(final JSplitPane jc) { + if (jc == null) { // Fix for HARMONY-2661, for compatibility with RI + throw new NullPointerException("jc is null"); + } return dividerLocation; }