When we create threads by implementing Runnable, You can pass a single Runnable instance to multiple Thread objects, so that the
same Runnable becomes the target of multiple threads, as follows :
i would like to know how to do the same thing by instantiating java.lang.Thread class. put in other words, how to start more than two threads that locks on the same object , when we extend Thread class to implement Thread behaviour. i hope you got my question ?