Testsuite name:AWT manual
Test name(s):AWT_Printing/Manual/InvalidParametersCommon/InvalidParametersCommonTest.html
Product(s) tested:JDK8u181b06(64bit)
Test tool: tonga-4.0.2-rc2.jar
OS/architecture:mac10.13-x64(Processor 3.06GHz Intel Core i3;Memory 4GB 1333MHz DDR3)

Actual behavior:
1,Step1 to Step7,the case is passed.
2,At Step8,Press the 'Print' button in the applet, PrintDialog pops up and there is no java.lang.NullPointerException thrown,refer to printdialog.png.