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| Core Java - Interview Questions and Answers for 'Runnable interface' - 3 question(s) found - Order By Rating | ||||
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 Discuss Correct / Improve  Threads Thread class runnable interface | ||||
 Related Questions | ||||
 Which keyword is used to provide explicit access of a code block to single thread ? a. Transient b. Final c. Explicit d. Synchronized | ||||
| Explain multithreading in Java ? | ||||
| What is a Deadlock ? | ||||
| Explain Thread States ? | ||||
| Why do we need Thread class even in case we execute thread using runnable interface ? | ||||
| What is the difference between time slicing and preemptive scheduling ? | ||||
| Difference between Process and Thread ? | ||||
| What is race condition ? | ||||
| What is the use of runnable interface if we can always create a new thread using Thread class ? | ||||
| What is an object's lock and which object's have locks? | ||||
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| Ans. It's a choice to be made whether to use first approach ( Thread class ) or second approach ( runnable interface ) by the programmer. The second facility has been given for cases where your class is already extending some parent class and hence cannot extend another class ( for Thread ) as Java doesn't allow multiple inheritance. | ||||
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| Discuss Correct / Improve java threads multithreading runnable interface concurrency | ||||
| Related Questions | ||||
| Why do we need Thread class even in case we execute thread using runnable interface ? | ||||
| Why do we use Thread Class as well as Runnable Interface for creating threads in Java ? | ||||
| What is the there only one method declared in Runnable interface? | ||||
| How executor service is better than using primitive Threading mechanism using Thread class or runnable Interface ? | ||||
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| Ans. Thread class holds the definition of start method ( This is the method that starts execution of new thread and then calls run method within the scope of new thread ). Interfaces don't hold any definition and so does runnable. So it makes it necessary the usage of Thread class , whatever implementation you choose. When your class extends the thread class, it carries the definition of start method from parent Thread class onto itself and hence new yourClass.start() helps starting a new thread and then executing run method in that new thread scope. When you implement runnable interface , you are just making it sure to the JVM that you have implemented the required method ( run() ) which the Thread start method will look for upon executing start method. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java threads multithreading runnable interface thread class | ||||
| Related Questions | ||||
| What is the use of runnable interface if we can always create a new thread using Thread class ? | ||||
| Why do we use Thread Class as well as Runnable Interface for creating threads in Java ? | ||||
| What is the there only one method declared in Runnable interface? | ||||
| How executor service is better than using primitive Threading mechanism using Thread class or runnable Interface ? | ||||
