attila@175: R1.run() invoked
attila@175: R2.run() invoked
attila@175: r3.run() invoked
attila@175: r1.class != r2.class: true
attila@175: r2.class == r3.class: true
attila@175: Got exception: java.lang.UnsupportedOperationException
attila@175: Got exception: java.lang.UnsupportedOperationException
attila@175: (new ExtendsList).size() = 0
attila@175: (new ExtendsList(){}).size() = 0