Discussion :: Threads
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public class MyRunnable implements Runnable{public void run(){// some code here}}which of these will create and start this thread?
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A.
new Runnable(MyRunnable).start(); |
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B.
new Thread(MyRunnable).run(); |
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C.
new Thread(new MyRunnable()).start(); |
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D.
new MyRunnable().start(); |
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Answer : Option C
Explanation :
Because the class implements Runnable, an instance of it has to be passed to the Thread constructor, and then the instance of the Thread has to be started.
A is incorrect. There is no constructor like this for Runnable because Runnable is an interface, and it is illegal to pass a class or interface name to any constructor.
B is incorrect for the same reason; you can't pass a class or interface name to any constructor.
D is incorrect because MyRunnable doesn't have a start() method, and the only start() method that can start a thread of execution is the start() in the Thread class.
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