java.lang.NullPointerException: This exception has no message.

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via Oracle Community by 807546, 1 year ago
This exception has no message.
at undefined.TestError2.access$000(
at undefined.TestError2$1.updateUI(
at javax.swing.AbstractButton.init(
at javax.swing.JButton.(
at javax.swing.JButton.(
at undefined.TestError2$1.(
at undefined.TestError2.main(

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