What are the different ways of thread usage?

There are two ways to define and implement a thread in Java. They are by implementing the runnable interface and extending the thread class.

Extending the Thread class
class InterviewBitThreadExample extends Thread{
public void run(){
System.out.println(“Thread runs…”);
}
public static void main(String args[]){
InterviewBitThreadExample ib = new InterviewBitThreadExample();
ib.start();
}
}
Implementing the Runnable interface
class InterviewBitThreadExample implements Runnable{
public void run(){
System.out.println(“Thread runs…”);
}
public static void main(String args[]){
Thread ib = new Thread(new InterviewBitThreadExample());
ib.start();
}
}
Implementing a thread using the method of Runnable interface is more preferred and advantageous as Java does not have support for multiple inheritances of classes.

start() method is used for creating a separate call stack for the thread execution. Once the call stack is created, JVM calls the run() method for executing the thread in that call stack.