Threads? What does it mean...

Question

class hii extends Thread {
public void run() {
System.out.println("Hello");
}
}

class MyClass {
public static void main(String[ ] args) {
hii obj = new hii ();
// ^^^ What does this line do?
obj.start();
}
}
// Why use threads?
// Wouldn't it work just fine without threads?

Answer 1

I think of threads like hands. I can work with more than one thing at the same time with the more hands that I have. Basically, threading allows you to create additional processes within a process.

Answer 2

Typical situations are background processes. Like calculations, database access. Anything that takes long. You don't want to stop your program till that is finished. So execute them on another thread.