java.lang.NullPointerException

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    • java.lang.NullPointerException: string is null at sun.java2d.SunGraphics2D.drawString(SunGraphics2D.java:2584) at Convert.paint(Convert.java:51) at sun.awt.RepaintArea.paint(RepaintArea.java:177) at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:374) at java.awt.Component.dispatchEventImpl(Component.java:3658) at java.awt.Container.dispatchEventImpl(Container.java:1623) at java.awt.Component.dispatchEvent(Component.java:3439) at java.awt.EventQueue.dispatchEvent(EventQueue.java:450) at jva.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136) at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)

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