I installed Windows 7 Home Premium (32bit) with Parallels 6 and version 6.23 of Java. When I run a Java aplet I only see a black rectangle. If I try to use a Java-based program I can not see the fonts properly, only small black squares aparace. Even in the Java settings (control panel), I can only see small black squares. I tried reinstalling Java and not fix the problem. Is it a graphics card error in Parallels (I have 3D acceleration enabled)?
I found the problem: I just uninstalled Java, changed the settings of the virtual machine disabling 3D acceleration and reinstalling Java.