Core Java - Interview Questions and Answers for 'Thread cla' | Search Interview Question

Core Java - Interview Questions and Answers for 'Thread cla' - 3 question(s) found - Order By Rating

Q1. Why do we use Thread Class as well as Runnable Interface for creating threads in Java ?

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Q2. Name few classes that extend Thread class ?

Core Java

Ans. http://www.buggybread.com/2015/02/java-threads-classes-that-inherit.html

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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

Can constructors be synchronized in Java ?

Explain multithreading in Java ?

What is a Deadlock ?

Why Struts 1 Classes are not Thread Safe whereas Struts 2 classes are thread safe ?

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 ?

Q3. Why do we need Thread class even in case we execute thread using runnable interface ?

Core Java

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.

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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 ?

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