Index: src/test/api/java/common/javax/swing/BoxTest.java =================================================================== --- src/test/api/java/common/javax/swing/BoxTest.java (revision 489013) +++ src/test/api/java/common/javax/swing/BoxTest.java (working copy) @@ -60,6 +60,12 @@ assertEquals("Preferred size initialized ", size, box.getPreferredSize()); assertEquals("Maximum size initialized ", size, box.getMaximumSize()); assertFalse("Opaqueness initialized ", box.isOpaque()); + + try { + Box.createRigidArea(null); + } catch (NullPointerException npe) { + fail("NullPointerException"); + } } public void testCreateVerticalBox() {