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This exception has no message.
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java.lang.NullPointerException: 	at javax.swing.RepaintManager.currentManager(RepaintManager.java:262)	at javax.swing.JComponent.repaint(JComponent.java:4799)	at java.awt.Component.repaint(Component.java:3303)	at javax.swing.JComponent.setFont(JComponent.java:2756)	at javax.swing.LookAndFeel.installColorsAndFont(LookAndFeel.java:208)	at javax.swing.plaf.basic.BasicPanelUI.installDefaults(BasicPanelUI.java:66)	at javax.swing.plaf.basic.BasicPanelUI.installUI(BasicPanelUI.java:56)	at javax.swing.JComponent.setUI(JComponent.java:664)	at javax.swing.JPanel.setUI(JPanel.java:153)	at javax.swing.JPanel.updateUI(JPanel.java:126)	at javax.swing.JPanel.(JPanel.java:86)	at javax.swing.JPanel.(JPanel.java:109)	at javax.swing.JPanel.(JPanel.java:117)	at lukemoll.MyClass.(MyClass.java:15)