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via Oracle Community by 807577, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at Kmeans.update(Kmeans.java:468)	at Kmeans.paint(Kmeans.java:520)	at javax.swing.JComponent.paintChildren(JComponent.java:523)	at javax.swing.JComponent.paint(JComponent.java:748)	at javax.swing.JComponent.paintChildren(JComponent.java:523)	at javax.swing.JComponent.paint(JComponent.java:748)