Index: modules/swing/src/test/api/java/common/javax/swing/text/DefaultCaretTest.java =================================================================== --- modules/swing/src/test/api/java/common/javax/swing/text/DefaultCaretTest.java (revision 453187) +++ modules/swing/src/test/api/java/common/javax/swing/text/DefaultCaretTest.java (working copy) @@ -231,6 +231,14 @@ + jta.getPropertyChangeListeners().length; assertEquals(tCompListenersCount, tCompListenersCountCurrent - 4); + // Regression for HARMONY-1750 + DefaultCaret obj = new DefaultCaret(); + try { + obj.install(null); + fail("NPE should be thrown"); + } catch (NullPointerException e) { + //expected + } }