This is in continuation of my first post HERE about the java interview questions I have come across.

1. What are Threads in JAVA and in what ways we can create them?

A. A Thread is defined as an independent path of execution in a program. A program in java can have many threads running concurrently, either synchronously or asynchronously. The threads are defined by java.lang.Thread class. There are two ways of creating a thread.de

a. Extend Thread class : In this method, the user defined class extends ‘Thread’ class and override ‘run()’ method in it.The ‘start()’ method is inherited from the Thread class and is invoked on the object of the user defined class to make the thread start executing.

class MyClass extends Thread{

       MyClass() {}
       public void run(){
             System.out.println("Thread initiated...");
       }

       public static void main(String[] args){
             MyClass obj = new MyClass();
             obj.start();
       }
}

b. Implement Runnable Interface: In this method, the user defined class implements the ‘Runnable’ interface and implement ‘run()’ method in it.  An object of the ‘Thread’ class is created by passing a Runnable object as an argument to the Thread constructor. The Thread object will then have a Runnable object that implements ‘run()’ … Read the rest