matlab出错
 

有时运行matlab一段时间之后，输入一个字符后会突然出现一下一大串的字符，我是新手，不知道为什么会出现这种情况，希望高手能够给予解答。非常感谢。

at java.text.AttributedString$AttributedStringIterator.<init>(Unknown Source)
at java.text.AttributedString.getIterator(Unknown Source)
at javax.swing.text.Utilities.drawComposedText(Unknown Source)
at javax.swing.text.PlainView.drawElement(Unknown Source)
at javax.swing.text.PlainView.drawLine(Unknown Source)
at com.mathworks.mde.cmdwin.CmdWinSyntaxUI$SyntaxPlainView.drawLine(CmdWinSyntaxUI.java:509)
at javax.swing.text.PlainView.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI$RootView.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.paintSafely(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.update(Unknown Source)