Index: src/test/api/java/common/javax/swing/text/DefaultCaretTest.java =================================================================== --- src/test/api/java/common/javax/swing/text/DefaultCaretTest.java (revision 494856) +++ src/test/api/java/common/javax/swing/text/DefaultCaretTest.java (working copy) @@ -226,6 +226,13 @@ + jta.getListeners(FocusListener.class).length + jta.getPropertyChangeListeners().length; assertEquals(tCompListenersCount, tCompListenersCountCurrent - 4); + + try { // Regression test for HARMONY-1750 + new DefaultCaret().install(null); + fail("NullPointerException should have been thrown"); + } catch (NullPointerException e) { + // Expected + } } /*