java.lang.NullPointerException

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    • java.lang.NullPointerException at javax.swing.plaf.basic.BasicComboBoxUI.paintCurrentValue(BasicComboBoxUI.java:1232) at javax.swing.plaf.metal.MetalComboBoxUI.paintCurrentValue(MetalComboBoxUI.java:90) at javax.swing.plaf.basic.BasicComboBoxUI.paint(BasicComboBoxUI.java:917) at javax.swing.plaf.metal.MetalComboBoxUI.paint(MetalComboBoxUI.java:62) at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161) at javax.swing.JComponent.paintComponent(JComponent.java:780) at javax.swing.JComponent.paint(JComponent.java:1056) at javax.swing.JComponent.paintChildren(JComponent.java:889)
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