Signed Java Web Start applications and applets that contain signed and unsigned components may be unsafe unless the application vendor intentionally uses mixed code. Starting from Java SE 6 Update 19, when a program contains both signed and unsigned components, a warning dialog box will appear.
solution
In the Security dialog box, if the user clicks Yes, potentially unsafe components will be prevented from running and the program may be terminated. If the user clicks the "No" button, the application or applet will continue to execute.
Warning is the default behavior, but the user has no option to manage this situation.
You can manage how to handle mixed-code programs through the Java Control Panel.
Find the Java control panel
Windows 8
Use search to find the control panel.
Press the Windows logo key +W to open the search box to search for settings.
or
Drag the mouse pointer to the lower right corner of the screen, and then click the search icon.
Enter the Java control panel in the search box.
Click the Java icon to open the Java control panel.
Windows 7、Vista
Click the Start button, and then click Control Panel Options.
Enter the Java control panel in the control panel search.
Click the Java icon to open the Java control panel.
Windows XP
Click the Start button, and then click Control Panel Options.
Double-click the Java icon to open the Java control panel.
Mac OS X 10.7.3 and higher.
Click the Apple icon in the upper left corner of the screen.
Go to System Preferences.
Click the Java icon to access the Java control panel.
See:/zh _ cn/download/help/error _ mixedcode.xml for the detailed solution? printFriendly=true