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via Oracle Community by 807546, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at TestError2.access$000(TestError2.java:4)	at TestError2$1.updateUI(TestError2.java:11)	at javax.swing.AbstractButton.init(AbstractButton.java:1930)	at javax.swing.JButton.(JButton.java:109)	at javax.swing.JButton.(JButton.java:64)	at TestError2$1.(TestError2.java:9)	at TestError2.main(TestError2.java:8)