我执行applet打印按钮

我执行applet打印按钮第一次时为何有这个错误
Exception in thread "AWT-EventQueue-1" java.lang.IndexOutOfBoundsException
at java.io.BufferedInputStream.read(BufferedInputStream.java:306)
at sun.net.www.MeteredStream.read(MeteredStream.java:116)
at java.io.FilterInputStream.read(FilterInputStream.java:111)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:2139)
at java.io.DataInputStream.read(DataInputStream.java:134)
at sun.print.IPPPrintService.readIPPResponse(IPPPrintService.java:1589)
at sun.print.IPPPrintService.opGetAttributes(IPPPrintService.java:1436)
at sun.print.IPPPrintService.initAttributes(IPPPrintService.java:333)
at sun.print.IPPPrintService.getSupportedDocFlavors(IPPPrintService.java:707)
at sun.print.IPPPrintService.isDocFlavorSupported(IPPPrintService.java:783)
at sun.print.RasterPrinterJob.getPrintService(RasterPrinterJob.java:428)
at sun.print.RasterPrinterJob.defaultPage(RasterPrinterJob.java:1420)
at java.awt.print.PrinterJob.defaultPage(PrinterJob.java:361)
at com.test.applet.PrintTestApplet.actionPerformed(PrintTestApplet.java:102)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
at java.awt.Component.processMouseEvent(Component.java:5488)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
at java.awt.Component.processEvent(Component.java:5253)
at java.awt.Container.processEvent(Container.java:1966)
at java.awt.Component.dispatchEventImpl(Compo
nent.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
at java.awt.Container.dispatchEventImpl(Container.java:2010)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)