Error while Entering Jpn characters on UI

[Gaurav Mac Mathur]

I have a Swing Ui, with a text filed and validations. while typing Jpn characters i am getting following error,

 java.lang.IllegalArgumentException: Invalid substring range
at java.text.AttributedString$AttributedStringIterator.<init>(AttributedString.java:587)
at java.text.AttributedString.getIterator(AttributedString.java:471)
at javax.swing.text.Utilities.drawComposedText(Utilities.java:611)
at javax.swing.text.PlainView.drawElement(PlainView.java:86)
at javax.swing.text.PlainView.drawLine(PlainView.java:70)
at javax.swing.text.PlainView.paint(PlainView.java:272)
at javax.swing.text.FieldView.paint(FieldView.java:169)
at javax.swing.plaf.basic.BasicTextUI$RootView.paint(BasicTextUI.java:1165)
at javax.swing.plaf.basic.BasicTextUI.paintSafely(BasicTextUI.java:518)
at javax.swing.plaf.basic.BasicTextUI.paint(BasicTextUI.java:652)
at javax.swing.plaf.basic.BasicTextUI.update(BasicTextUI.java:631)
at javax.swing.JComponent.paintComponent(JComponent.java:390)
at javax.swing.JComponent.paint(JComponent.java:686)
at javax.swing.JComponent._paintImmediately(JComponent.java:3831)
at javax.swing.JComponent.paintImmediately(JComponent.java:3671)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:450)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:119)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:149)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:332)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:126)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:88)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:80)
Exception occurred during event dispatching:
java.lang.IllegalArgumentException: Invalid substring range 

Any Idea what is going wrong ?