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1 ：no.name.NullpoInterException ：2005/11/01(火) 02:03:59 ID:Wlz355OY

M:\2005\2005\matsu-lab\Java\zemidata>

M:\2005\2005\matsu-lab\Java\zemidata>javac kadai4.java

M:\2005\2005\matsu-lab\Java\zemidata>java kadai4
java.lang.NullPointerException: string is null
at sun.java2d.SunGraphics2D.drawString(SunGraphics2D.java:2534)
at MyFrame4.paint(kadai4.java:54)
at sun.awt.RepaintArea.paint(RepaintArea.java:177)
at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:260)
at java.awt.Component.dispatchEventImpl(Component.java:3678)
at java.awt.Container.dispatchEventImpl(Container.java:1627)
at java.awt.Window.dispatchEventImpl(Window.java:1606)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

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