What does .class mean ?

Hi.

I'm starting to program in Android. When using tabs, I have this line of code:

tabHost.addTab(tabHost.newTabSpec(i + "").setIndicator(names[i]), myClass.class, b);

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What does the .class mean? Can I make an array of a set of classes with the .class? For example:

   myArray[0] = myClass.class;
   myArray[1] = myOtherClass.class;
etc... ?

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In this case, which type should be declared this array?

Thank you.