Write a Java Program to Implement Multithreading

Multithreading in Java:

Multithreading is a programming language concept in which a program or process is divided into two or more subprograms that are executed at the same time in parallel. It is the ability of a program or an operating system to enable more than one user at a time without requiring multiple copies of the program running on the computer.

Java Program to Implement Multithreading:

class MyThread implements Runnable{
String name;
Thread t;
MyThread(String thrdname){
name = thrdname;
t= new Thread(this, name);
System.out.println("New Thread:" +t);
t.start();
}
public void run()
{
try{
for(int i=7;i>0;i--){
System.out.println(name +": " +i);
Thread.sleep(1000);
}
}
catch(InterruptedException e)
{
System.out.println(name+" interrupted.");

}
System.out.println(name+" existing.");
}
}
class Thread{

public static void main(String args[]){
MyThread obj1 = new MyThread("One");
MyThread obj2 = new MyThread("Two");
MyThread obj3 = new MyThread("Three");
System.out.println("Thread One is alive: "+obj1.t.isAlive());
System.out.println("Thread Two is alive: "+obj2.t.isAlive());
System.out.println("Thread Three is alive: "+obj3.t.isAlive());
try{
System.out.println("Waiting for threads to finish.");
obj1.t.join();
obj2.t.join();
obj3.t.join();
}
catch(InterruptedException e){
System.out.println("Main Thread Interrupted");
}
System.out.println("Thread One is alive: "+obj1.t.isAlive());
System.out.println("Thread Two is alive: "+obj2.t.isAlive());
System.out.println("Thread Three is alive: "+obj3.t.isAlive());
System.out.println("Main Thread Existing");
}
}