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via Oracle Community by 807587, 1 year ago
java.lang.NullPointerException: 	at javax.swing.plaf.basic.BasicComboPopup.getPopupHeightForRowCount(BasicComboPopup.java:838)	at javax.swing.plaf.basic.BasicComboPopup.show(BasicComboPopup.java:106)	at javax.swing.plaf.basic.BasicComboPopup.togglePopup(BasicComboPopup.java:800)	at javax.swing.plaf.basic.BasicComboPopup$InvocationMouseHandler.mousePressed(BasicComboPopup.java:437)	at java.awt.Component.processMouseEvent(Component.java:3707)