Is Android a less secure OS?

[WinAndLinuxTutorials]

I asked this question because Android apps are developed in Java language. And we know how Java has a lot of security issues. The apps are ran inside Google's own virtual machine named Dalvik. What is your opinion?

More information about Dalvik: http://www.oreillynet.com/onjava/blog/2007/11/dalvik_googles_tweaked_nonstan.html