Why Java is Multi-Threaded and JavaScript is Single-Threaded

One of the most common questions beginners and interviewers ask is: Why is Java multi-threaded while JavaScript is not? Even though both languages look similar in syntax, their design goals and execution environments are completely different. Let’s understand this in simple terms. 🔹 What Does Multi-Threaded Mean? A multi-threaded program can: Execute multiple tasks at the same time Use multiple CPU cores Improve performance for heavy workloads 🔹 Why Java is Multi-Threaded Java was designed for: Enterprise applications Backend servers Banking and financial systems Large-scale systems These applications need to: ✔ Handle many users simultaneously ✔ Process multiple tasks in parallel ✔ Use CPU efficiently That’s why Java supports true multi-threading. Example in Java: `class MyThread extends Thread { public void run() { System.out.println("Thread running"); } } public class Main { public static void main(String[] args) { MyThread t1 = new MyThread(); MyThread t2 = new MyThread(); t1.start