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via Oracle Community by 807577, 1 year ago
This exception has no message.
via Google Groups by Jan Bösenberg, 8 months ago
via Google Groups by Norbert, 9 months ago
java.lang.NullPointerException at javax.swing.ImageIcon.<init>(ImageIcon.java:138) at mjava.TestTree3.<init>(TestTree3.java:39) at mjava.TestTree3.main(TestTree3.java:82)