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    What are two ways of creating threads in Java and why so?

    Threads can be created in the following ways :

    -Instantiating a class extending java.lang.Thread class and calling start() method

    -Creating a java.lang.Thread and passing a reference of a class implementing Runnable interface.Then calling start() method on this object.
    As mentioned,Java supports these two mechanisms for Thread creations but second option is preferred as in first case there is a possibility of single inheritance making a thread object less flexible in its behaviour while in second case a thread object can be clubbed with multiple features.

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