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Introduction In Java programming, achieving parallel execution of tasks is made possible using multithreading. This blog explores how to create and run multiple threads concurrently, why using start() is critical, how scheduling works, and additional tips like using sleep() for clearer outputs. Demonstrating Multiple Threads Let's start with a simple example. We define two threads—one to say “Hi” and another to say “Hello”. class HiThread extends Thread {   public void run() {     for(int i = 0; i < 5; i++) {       System.out.println("Hi");       try { Thread.sleep(500); } catch(Exception e) {}     }   } } class HelloThread extends Thread {   public void run() {     for(int i = 0; i < 5; i++) {       System.out.println("Hello");       try { Thread.sleep...

Introduction In modern applications, responsiveness and efficiency are essential. Whether you’re building a desktop app, a game, or a backend server, you often need to perform multiple tasks simultaneously. This is where Threads in Java come into play. Threads allow you to run multiple tasks concurrently, making programs faster and more efficient. In this blog, we’ll explore: What threads are and why they are important How to create and manage threads in Java The thread lifecycle Common problems like race conditions How to ensure thread safety What is a Thread? A thread is the smallest unit of execution in a program. While a process represents an entire running application, threads are lightweight sub-tasks inside that process. 👉 Example: When you use WhatsApp, one thread handles message sending, another handles receiving, while another manages notifications — all at the same time. This is possible because of multithreading , which enables multiple threa...