Index: modules/swing/src/test/api/java/common/javax/swing/JLayeredPaneTest.java =================================================================== --- modules/swing/src/test/api/java/common/javax/swing/JLayeredPaneTest.java (revision 478058) +++ modules/swing/src/test/api/java/common/javax/swing/JLayeredPaneTest.java (working copy) @@ -370,6 +370,15 @@ assertEquals(6, layered.getComponentCount()); } + public void testMoveToBackComponent_1() { + try{ + layered.moveToBack(null); + fail("NullPointerException have to throw"); + }catch(NullPointerException e){ + assertTrue(true); + } + } + /* * Class under test for int getPosition(Component) */