Which interface must be implemented by all threads?

Which interface must be implemented by all threads?

Runnable interface in
The Runnable interface in Java is the core element when you are working with Threads. Any Java class intending to execute threads must implement the Runnable interface.

Which method is used for Thread?

public void run(): is used to perform action for a thread. public void start(): starts the execution of the thread. JVM calls the run() method on the thread. public void sleep(long miliseconds): Causes the currently executing thread to sleep (temporarily cease execution) for the specified number of milliseconds.

Which method is used as entry point for the Thread?


Method Signature Description
void start() This method will start a new thread of execution by calling run() method of Thread/runnable object.
void run() This method is the entry point of the thread. Execution of thread starts from this method.

How do you implement a Thread?

A thread can be created by implementing the Runnable interface and overriding the run() method. Then a Thread object can be created and the start() method called. The Main thread in Java is the one that begins executing when the program starts.

Which two of the following methods are defined in class thread?

Which two of the following methods are defined in class Thread? Explanation: (1) and (4). Only start() and run() are defined by the Thread class.

Which methods are defined in class thread?

Thread Class Methods

Method Description
run() Entry point for a thread
sleep() suspend thread for a specified time
start() start a thread by calling run() method
activeCount() Returns an estimate of the number of active threads in the current thread’s thread group and its subgroups.

Can a dead thread be restarted?

So there is no way to bring back the dead thread to runnable state,instead you should create a new Thread instance. It is never legal to start a thread more than once. In particular, a thread may not be restarted once it has completed execution. You’ll have to start a brand new instance.

Which two options allow you to create threads?

There are two ways to create a thread:

  • extends Thread class.
  • implement Runnable interface.

Which way of creating thread is better?

Hence we are missing Inheritance benefits. In the second approach, while implementing Runnable interface we can extends any other class. Hence we are able to use the benefits of Inheritance. Because of the above reasons, implementing Runnable interface approach is recommended than extending Thread class.

Which method is static in thread class?

Class methods

Sr.No. Method & Description
4 static Thread currentThread() This method returns a reference to the currently executing thread object.
5 static void dumpStack() This method prints a stack trace of the current thread to the standard error stream.

Which is method must be implemented by all threads in Java?

Which method must be implemented by all threads in Java? While creating a thread class we must override the run () method of the Thread class. This method provides an entry point for the thread and you will put your complete business logic inside this method.

Which is the run method in a thread?

Explanation: The run () method to a thread is like the main () method to an application. Starting the thread causes the object’s run method to be called in that separately executing thread. 8. Which class or interface defines the wait (), notify (),and notifyAll () methods?

How does the execution of a thread start?

Execution of thread starts from this method. By invoking this method the current thread pause its execution temporarily and allow other threads to execute. This method used to queue up a thread in execution. Once called on thread, current thread will wait till calling thread completes its execution

Are there any methods called on the thread class object?

We have various methods which can be called on Thread class object. These methods are very useful when writing a multithreaded application. Thread class has following important methods. We will understand various thread states as well later in this tutorial.