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

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via Oracle Community by 807587, 1 year ago
This exception has no message.
java.lang.NullPointerException:
at javax.swing.plaf.basic.BasicInternalFrameUI$BorderListener.mouseExited(BasicInternalFrameUI.java:1160)
at java.awt.AWTEventMulticaster.mouseExited(AWTEventMulticaster.java:252)

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