test/jdk/javax/swing/dnd/8139050/NativeErrorsInTableDnD.java

rev 47956 : 8191678: [TESTBUG] Add keyword headful in java/awt and javax tests.
Summary: Also fix some NPE thrown if run headless.

@@ -38,14 +38,16 @@
 import static javax.swing.UIManager.getInstalledLookAndFeels;
 
 /**
  * @test
  * @bug 8139050 8153871
+ * @key headful
  * @library ../../../../lib/testlibrary
  * @build ExtendedRobot
  * @run main/othervm/timeout=360 -Xcheck:jni NativeErrorsInTableDnD
  */
+
 public final class NativeErrorsInTableDnD {
 
     private static JFrame frame;
 
     private static volatile Rectangle bounds;